Condensed Matter

1903 Submissions

[24] viXra:1903.0537 [pdf] submitted on 2019-03-29 08:38:48

Chirality Oscillation in Antiferromagnets

Authors: George Rajna
Comments: 26 Pages.

A quasiparticle is a disturbance or excitation (e.g. spin waves, bubbles, etc.) that behaves as a particle and could therefore be regarded as one. Long-range interactions between quasiparticles can give rise to a 'drag,' which affects the fundamental properties of many systems in condensed matter physics. [16] Researchers have recently been also interested in the utilization of antiferromagnets, which are materials without macroscopic magnetization but with a staggered orientation of their microscopic magnetic moments. [15]
Category: Condensed Matter

[23] viXra:1903.0527 [pdf] submitted on 2019-03-30 04:22:52

Brightening Perovskite LEDs

Authors: George Rajna
Comments: 26 Pages.

Very recently, an NTU team lead by Assoc. Prof. Wang Hong, demonstrated high light extraction efficiency of perovskite photonic crystals fabricated by delicate electron-beam lithography. [17] A quasiparticle is a disturbance or excitation (e.g. spin waves, bubbles, etc.) that behaves as a particle and could therefore be regarded as one. Long-range interactions between quasiparticles can give rise to a 'drag,' which affects the fundamental properties of many systems in condensed matter physics. [16]
Category: Condensed Matter

[22] viXra:1903.0526 [pdf] submitted on 2019-03-30 04:31:50

Perovskite Light-Emitting Diodes

Authors: George Rajna
Comments: 28 Pages.

Efficient near-infrared (NIR) light-emitting diodes of perovskite have been produced in a laboratory at Linköping University. The external quantum efficiency is 21.6 percent, which is a record. The results have been published in Nature Photonics. [18] Very recently, an NTU team lead by Assoc. Prof. Wang Hong, demonstrated high light extraction efficiency of perovskite photonic crystals fabricated by delicate electron-beam lithography. [17] A quasiparticle is a disturbance or excitation (e.g. spin waves, bubbles, etc.) that behaves as a particle and could therefore be regarded as one. Long-range interactions between quasiparticles can give rise to a 'drag,' which affects the fundamental properties of many systems in condensed matter physics. [16] Researchers have recently been also interested in the utilization of antiferromagnets, which are materials without macroscopic magnetization but with a staggered orientation of their microscopic magnetic moments. [15] A new method that precisely measures the mysterious behavior and magnetic properties of electrons flowing across the surface of quantum materials could open a path to next-generation electronics. [14] The emerging field of spintronics aims to exploit the spin of the electron. [13] In a new study, researchers measure the spin properties of electronic states produced in singlet fission-a process which could have a central role in the future development of solar cells. [12] In some chemical reactions both electrons and protons move together. When they transfer, they can move concertedly or in separate steps. Light-induced reactions of this sort are particularly relevant to biological systems, such as Photosystem II where plants use photons from the sun to convert water into oxygen. [11] EPFL researchers have found that water molecules are 10,000 times more sensitive to ions than previously thought. [10] Working with colleagues at the Harvard-MIT Center for Ultracold Atoms, a group led by Harvard Professor of Physics Mikhail Lukin and MIT Professor of Physics Vladan Vuletic have managed to coax photons into binding together to form molecules-a state of matter that, until recently, had been purely theoretical. The work is described in a September 25 paper in Nature.
Category: Condensed Matter

[21] viXra:1903.0423 [pdf] submitted on 2019-03-23 10:17:19

Induced Dipoles Damp Plasmons

Authors: George Rajna
Comments: 60 Pages.

The light scattered by plasmonic nanoparticles is useful, but some of it gets lost at the surface and scientists are now starting to figure out why. [37] In a new review, researchers have described the fundamental physics that causes magnetoelectricity from a theoretical viewpoint. [36] Physicists at EPFL propose a new "quantum simulator": a laser-based device that can be used to study a wide range of quantum systems. [35] The DESY accelerator facility in Hamburg, Germany, goes on for miles to host a particle making kilometer-long laps at almost the speed of light. Now researchers have shrunk such a facility to the size of a computer chip. [34] University of Michigan physicists have led the development of a device the size of a match head that can bend light inside a crystal to generate synchrotron radiation in a lab. [33] A new advance by researchers at MIT could make it possible to produce tiny spectrometers that are just as accurate and powerful but could be mass produced using standard chip-making processes. [32] Scientists from the Department of Energy's SLAC National Accelerator Laboratory and the Massachusetts Institute of Technology have demonstrated a surprisingly simple way of flipping a material from one state into another, and then back again, with single flashes of laser light. [31] Materials scientists at Duke University computationally predicted the electrical and optical properties of semiconductors made from extended organic molecules sandwiched by inorganic structures. [30] KU Leuven researchers from the Roeffaers Lab and the Hofkens Group have now put forward a very promising direct X-ray detector design, based on a rapidly emerging halide perovskite semiconductor, with chemical formula Cs2AgBiBr6. [29] Physicists at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have proven that incoming light causes the electrons in warm perovskites to rotate, thus influencing the direction of the flow of electrical current. [28] Self-assembly and crystallisation of nanoparticles (NPs) is generally a complex process, based on the evaporation or precipitation of NP-building blocks. [27]
Category: Condensed Matter

[20] viXra:1903.0418 [pdf] submitted on 2019-03-23 11:58:35

Organic Materials for Electronics

Authors: George Rajna
Comments: 63 Pages.

Organic electronics have the potential to revolutionize technology with their high cost-efficiency and versatility compared with more commonly used inorganic electronics. [39] By using an infrared laser beam to induce a phenomenon known as an electron avalanche breakdown near the material, the new technique is able to detect shielded material from a distance. [38] The light scattered by plasmonic nanoparticles is useful, but some of it gets lost at the surface and scientists are now starting to figure out why. [37] In a new review, researchers have described the fundamental physics that causes magnetoelectricity from a theoretical viewpoint. [36]
Category: Condensed Matter

[19] viXra:1903.0414 [pdf] submitted on 2019-03-22 08:17:02

Spin Dances with Dipole

Authors: George Rajna
Comments: 58 Pages.

In a new review, researchers have described the fundamental physics that causes magnetoelectricity from a theoretical viewpoint. [36] Physicists at EPFL propose a new "quantum simulator": a laser-based device that can be used to study a wide range of quantum systems. [35] The DESY accelerator facility in Hamburg, Germany, goes on for miles to host a particle making kilometer-long laps at almost the speed of light. Now researchers have shrunk such a facility to the size of a computer chip. [34] University of Michigan physicists have led the development of a device the size of a match head that can bend light inside a crystal to generate synchrotron radiation in a lab. [33] A new advance by researchers at MIT could make it possible to produce tiny spectrometers that are just as accurate and powerful but could be mass produced using standard chip-making processes. [32] Scientists from the Department of Energy's SLAC National Accelerator Laboratory and the Massachusetts Institute of Technology have demonstrated a surprisingly simple way of flipping a material from one state into another, and then back again, with single flashes of laser light. [31] Materials scientists at Duke University computationally predicted the electrical and optical properties of semiconductors made from extended organic molecules sandwiched by inorganic structures. [30] KU Leuven researchers from the Roeffaers Lab and the Hofkens Group have now put forward a very promising direct X-ray detector design, based on a rapidly emerging halide perovskite semiconductor, with chemical formula Cs2AgBiBr6. [29] Physicists at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have proven that incoming light causes the electrons in warm perovskites to rotate, thus influencing the direction of the flow of electrical current. [28] Self-assembly and crystallisation of nanoparticles (NPs) is generally a complex process, based on the evaporation or precipitation of NP-building blocks. [27]
Category: Condensed Matter

[18] viXra:1903.0336 [pdf] submitted on 2019-03-18 16:42:45

Spin Electromagnetics and Spin-Vector-Potential-Coupling-Induced Force

Authors: Hui Peng
Comments: 19 Pages.

By utilizing universal mathematical identities (UMI) and Coulomb’s law, we establish Classical-Spin-Electromagnetics (C-Spin-EM). C-Spin-EM is self-consistence, powerful and fruitful, at classical level, in the perspective of fundamental physics: (1) universally explains and correlates family of Hall effects, zero longitudinal Hall coefficient/resistivity, Aharonov–Bohm effect, Extended Rashba SOC, and GMR/TMR. (2) predicts Spin-potential-coupling-induced force, which contributes to Aharonov–Bohm effect; (3) provides classical counterparts of Larmor-precession, Stark Effect, Landau–Lifshitz equation, Zeeman effect, and Aharonov–Casher effect; (4) propose that electric field induces spin precession. Combining UMI and C-Spin-EM shows that mathematical identities lead to physical dualities including duality between Electromagnetics and C-Spin-EM. We postulate a duality between Lagrangian-Lorentz force and Hamiltonian.
Category: Condensed Matter

[17] viXra:1903.0299 [pdf] submitted on 2019-03-15 11:46:28

Nanocrystal Quantum Dot Factory

Authors: George Rajna
Comments: 42 Pages.

North Carolina State University researchers have developed a microfluidic system for synthesizing perovskite quantum dots across the entire spectrum of visible light. [29] Nanoparticles derived from tea leaves inhibit the growth of lung cancer cells, destroying up to 80% of them, new research by a joint Swansea University and Indian team has shown. [28] A team of researchers including U of A engineering and physics faculty has developed a new method of detecting single photons, or light particles, using quantum dots. [27]
Category: Condensed Matter

[16] viXra:1903.0285 [pdf] submitted on 2019-03-14 08:59:53

Silicon Under Intense Pressure

Authors: George Rajna
Comments: 77 Pages.

Using a new technique, researchers were able to directly watch and image this process. To their surprise, they discovered that it included an extra step that had not been seen before: After the first elastic shock wave traveled through the silicon, a second elastic wave appeared before the final inelastic wave changed the material's properties. [47] The device was produced using conventional semiconductor manufacturing processes, and the team now hopes to scale up the technology to create a silicon-based quantum-computer chip. [46] Physicists at the University of Alberta in Canada have developed a new way to build quantum memories, a method for storing delicate quantum information encoded into pulses of light. [45] Now, an Australian research team has experimentally realised a crucial combination of these capabilities on a silicon chip, bringing the dream of a universal quantum computer closer to reality. [44] A theoretical concept to realize quantum information processing has been developed by Professor Guido Burkard and his team of physicists at the University of Konstanz. [43] As the number of hacks and security breaches rapidly climbs, scientists say there may be a way to make a truly unhackable network by using the laws of quantum physics. [42] This world-first nanophotonic device, just unveiled in Nature Communications, encodes more data and processes it much faster than conventional fiber optics by using a special form of 'twisted' HYPERLINK "https://phys.org/tags/light/" light. [41] Purdue University researchers created a new technique that would increase the secret bit rate 100-fold, to over 35 million photons per second. [40] Physicists at The City College of New York have used atomically thin two-dimensional materials to realize an array of quantum emitters operating at room temperature that can be integrated into next generation quantum communication systems. [39]
Category: Condensed Matter

[15] viXra:1903.0238 [pdf] submitted on 2019-03-12 14:49:59

Metasurface Rotates Polarization

Authors: George Rajna
Comments: 56 Pages.

Researchers at the University of Michigan and City University of New York have recently proposed and experimentally validated a transparent, electronically tunable metasurface. [34] By measuring how the electric current of an ionic fluid is generated by the flow of water through ångström-sized channels, researchers in France and the UK have discovered that this current is sensitive to an electric field when pressure is applied. [33] Devices based on magnonic currents-quasi-particles associated with waves of magnetization, or spin waves, in certain magnetic materials-would transform the industry, though scientists need to better understand how to control them. [32] Such devices would use magnetic films and superconducting thin films to deploy and manipulate magnetic monopoles to sort and store data based on the north or south direction of their poles-analogous to the ones and zeros in conventional magnetic storage devices. [31] The vacuum is filled with quantum fluctuations of the electromagnetic field-virtual photons that pop in and out of existence-that are assumed to behave in the same way. To make the plates repulsive and tunable, Wilczek and Stockholm University colleague Qing-Dong Jiang inserted a material between the plates that breaks this behavior. [30] In terms of physics, the interiors of neutron stars, cold atomic gasses and nuclear systems all have one thing in common: they are gaseous systems made up of highly interactive, superfluid fermions. [29] Engineers at MIT and Penn State University have found that under the right conditions, ordinary clear water droplets on a transparent surface can produce brilliant colors, without the addition of inks or dyes. [28]
Category: Condensed Matter

[14] viXra:1903.0192 [pdf] submitted on 2019-03-10 09:58:58

Super Superlattices Graphene Electronics

Authors: George Rajna
Comments: 75 Pages.

Physicists at the University of Basel have now shown for the first time the combination with a third layer can result in new material properties also in a three-layer sandwich of carbon and boron nitride. [45] Graphene-based computer components that can deal in terahertz “could be used, not in a normal Macintosh or PC, but perhaps in very advanced computers with high processing rates,” Ozaki says. This 2-D material could also be used to make extremely high-speed nanodevices, he adds. [44] Printed electronics use standard printing techniques to manufacture electronic devices on different substrates like glass, plastic films, and paper. [43]
Category: Condensed Matter

[13] viXra:1903.0169 [pdf] submitted on 2019-03-09 09:30:03

Streaming Current Measurement

Authors: George Rajna
Comments: 54 Pages.

By measuring how the electric current of an ionic fluid is generated by the flow of water through ångström-sized channels, researchers in France and the UK have discovered that this current is sensitive to an electric field when pressure is applied. [33] Devices based on magnonic currents-quasi-particles associated with waves of magnetization, or spin waves, in certain magnetic materials-would transform the industry, though scientists need to better understand how to control them. [32] Such devices would use magnetic films and superconducting thin films to deploy and manipulate magnetic monopoles to sort and store data based on the north or south direction of their poles-analogous to the ones and zeros in conventional magnetic storage devices. [31] The vacuum is filled with quantum fluctuations of the electromagnetic field-virtual photons that pop in and out of existence-that are assumed to behave in the same way. To make the plates repulsive and tunable, Wilczek and Stockholm University colleague Qing-Dong Jiang inserted a material between the plates that breaks this behavior. [30] In terms of physics, the interiors of neutron stars, cold atomic gasses and nuclear systems all have one thing in common: they are gaseous systems made up of highly interactive, superfluid fermions. [29] Engineers at MIT and Penn State University have found that under the right conditions, ordinary clear water droplets on a transparent surface can produce brilliant colors, without the addition of inks or dyes. [28]
Category: Condensed Matter

[12] viXra:1903.0152 [pdf] submitted on 2019-03-08 07:36:17

Antifreeze Proteins Grow Ice Crystals

Authors: George Rajna
Comments: 52 Pages.

In a new study, a German-Israeli research team has confirmed that these proteins also possess an unusual second property: at low temperatures, they can promote rather than inhibit the growth of ice crystals. [29] For the first time, a University of Michigan chemist has used quantum entanglement to examine protein structures, a process that requires only a very small number of photons of light. [28] Sunlight is essential for all life, and living organisms have evolved to sense and respond to light. [27] Using X-ray laser technology, a team led by researchers of the Paul Scherrer Institute PSI has recorded one of the fastest processes in biology. [26]
Category: Condensed Matter

[11] viXra:1903.0151 [pdf] submitted on 2019-03-08 08:00:33

Thermo-Sensor Magnetic Bits

Authors: George Rajna
Comments: 35 Pages.

Scientists of the Department of Physics at the University of Hamburg, Germany, detected the magnetic states of atoms on a surface using only heat. [22] Researchers at The Ohio State University have discovered how to control heat with a magnetic field. [21] Researchers at the University of Illinois at Urbana-Champaign have developed a new technology for switching heat flows 'on' or 'off'. [20] Thermoelectric materials can use thermal differences to generate electricity. Now there is an inexpensive and environmentally friendly way of producing them with the simplest tools: a pencil, photocopy paper, and conductive paint. [19] A team of researchers with the University of California and SRI International has developed a new type of cooling device that is both portable and efficient. [18] Thermal conductivity is one of the most crucial physical properties of matter when it comes to understanding heat transport, hydrodynamic evolution and energy balance in systems ranging from astrophysical objects to fusion plasmas. [17] Researchers from the Theory Department of the MPSD have realized the control of thermal and electrical currents in nanoscale devices by means of quantum local observations. [16] Physicists have proposed a new type of Maxwell's demon-the hypothetical agent that extracts work from a system by decreasing the system's entropy-in which the demon can extract work just by making a measurement, by taking advantage of quantum fluctuations and quantum superposition. [15] Pioneering research offers a fascinating view into the inner workings of the mind of 'Maxwell's Demon', a famous thought experiment in physics. [14] For more than a century and a half of physics, the Second Law of Thermodynamics, which states that entropy always increases, has been as close to inviolable as any law we know. In this universe, chaos reigns supreme. [13] Physicists have shown that the three main types of engines (four-stroke, twostroke, and continuous) are thermodynamically equivalent in a certain quantum regime, but not at the classical level. [12]
Category: Condensed Matter

[10] viXra:1903.0110 [pdf] submitted on 2019-03-06 09:59:53

Neutron Scattering Magnetic Materials

Authors: George Rajna
Comments: 29 Pages.

Physicists from the University of Luxembourg and their research partners have demonstrated for the first time in a comprehensive study how magnetic materials can be examined using neutron scattering techniques. [18] Scientists using neutron scattering methods to look at the behavior of materials under stress or during phase changes and chemical reactions can view processes from new angles using event-based data. [17]
Category: Condensed Matter

[9] viXra:1903.0096 [pdf] submitted on 2019-03-05 06:49:55

Successful Pymergy Extraction

Authors: Savior F. Eason
Comments: 32 Pages.

A report of data yielded latest successful tests of pymergy extraction from Zero-point concentrations of planck mass and commercial sanchez portal generation in a rare collaboration between SIAII and JOYCE labs.
Category: Condensed Matter

[8] viXra:1903.0079 [pdf] submitted on 2019-03-06 03:35:44

Unique, Tiny Resonator

Authors: George Rajna
Comments: 74 Pages.

"The novelty here is if you excite this resonator device in the right way, the structure vibrates with a spectrum consisting of multiple frequencies evenly spaced, in spite of the fact that it is driven by a single frequency," said Daniel Lopez, group leader for the Center for Nanoscale Materials' Nanofabrication and Devices group. [43] A research team from ITMO University and the Australian National University has discovered that different metasurfaces exhibit the same behavior provided a symmetry breaking is introduced to their unit cells "meta-atoms."[42]
Category: Condensed Matter

[7] viXra:1903.0074 [pdf] replaced on 2019-03-16 10:57:29

Some Problems About The Electron-Pair Theory In Superconductor

Authors: Ting-Hang Pei
Comments: 9 Pages.

We review the superconductor theory based on the electron pair first. Then several viewpoints are discussed and concluded that such electron pair is not stable in the superconducting state. The speed of each electron in the electron pair is about 2.02x10^6 m/s in Al. However, the longitudinal and transverse speeds of the crystal waves in Al is merely 6.47x10^3 m/s and 3.40x10^3 m/s in [100] direction, respectively. It is almost impossible that the mediated phonon can real-time transfer momentum and energy between two so high-speed and inverse-momentum electrons in the superconducting state. The more possible process is that each electron can absorb other phonons propagating from any place in the crystal. The best condition for the electron pair is total zero momentum but how to make such electron pair stably conduct electric current is a problem because one of them is accelerated and the other is decelerated applied the external electric field. In conclusion, the electron pair is not physical but just the quasi-physical process and the mediated phonon is a virtual one for calculating the second-order perturbation.
Category: Condensed Matter

[6] viXra:1903.0061 [pdf] submitted on 2019-03-05 04:40:30

Magnonic Devices Replace Electronics

Authors: George Rajna
Comments: 52 Pages.

Devices based on magnonic currents—quasi-particles associated with waves of magnetization, or spin waves, in certain magnetic materials—would transform the industry, though scientists need to better understand how to control them. [32] Such devices would use magnetic films and superconducting thin films to deploy and manipulate magnetic monopoles to sort and store data based on the north or south direction of their poles—analogous to the ones and zeros in conventional magnetic storage devices. [31]
Category: Condensed Matter

[5] viXra:1903.0056 [pdf] submitted on 2019-03-03 07:21:19

Polka-Dot Exposed to a Magnetic Field

Authors: George Rajna
Comments: 43 Pages.

A team of researchers from Royal Holloway University of London and Cornell University has found that a polka-dot pattern emerges in superfluid helium-3 when it is placed in a thin cavity and subjected to a magnetic field. [31] This tiered "wedding cake," which appears in images that show the energy level structure of the electrons, experimentally confirms how electrons interact in a tightly confined space according to long-untested rules of quantum mechanics. [30]
Category: Condensed Matter

[4] viXra:1903.0054 [pdf] submitted on 2019-03-03 07:42:41

Droplets Produce Iridescent Colors

Authors: George Rajna
Comments: 42 Pages.

Engineers at MIT and Penn State University have found that under the right conditions, ordinary clear water droplets on a transparent surface can produce brilliant colors, without the addition of inks or dyes. [28] A miniature prison for photons—that is the nanocavity discovered by scientists of the University of Twente. [27]
Category: Condensed Matter

[3] viXra:1903.0053 [pdf] submitted on 2019-03-03 08:01:54

Exotic Topological Materials are Common

Authors: George Rajna
Comments: 41 Pages.

The team created an online catalog to make it easy to design new topological materials using elements from the periodic table. [24] Topological effects, such as those found in crystals whose surfaces conduct electricity while their bulk does not, have been an exciting topic of physics research in recent years and were the subject of the 2016 Nobel Prize in physics. [23]
Category: Condensed Matter

[2] viXra:1903.0039 [pdf] submitted on 2019-03-02 07:05:49

Supercomputing Controlling Noise

Authors: George Rajna
Comments: 48 Pages.

Combining principles from computational fluid dynamics and acoustics, researchers at the TU Berlin have developed an analytical model that could simplify the process of designing Helmholtz resonators, a type of noise cancelling structure used in airplanes, ships, and ventilation systems. [32] During this run, from 2015 to 2018, LHC experiments produced unprecedented volumes of data with the machine's performance exceeding all expectations. [31]
Category: Condensed Matter

[1] viXra:1903.0019 [pdf] submitted on 2019-03-01 11:39:24

Photons in Jail

Authors: George Rajna
Comments: 38 Pages.

A miniature prison for photons—that is the nanocavity discovered by scientists of the University of Twente. [27] Topological effects, such as those found in crystals whose surfaces conduct electricity while their bulk does not, have been an exciting topic of physics research in recent years and were the subject of the 2016 Nobel Prize in physics. [26] A team of scientists led by Dr. Eleftherios Goulielmakis, head of the research group "Attoelectronics" at the Max Planck Institute of Quantum Optics, have been able to capture the dynamics of core-excitons in solids in real-time. [25]
Category: Condensed Matter