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| viXra.org > Condensed Matter > 2511 |
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[4] viXra:2511.0066 [pdf] submitted on 2025-11-14 17:04:48
Authors: Giustino Travaglini
Comments: 4 Pages.
The pursuit of room-temperature superconductivity has recently been dominated by the high-pressure phases of hydrogen-rich materials, such as Hu2083S and LaHu2081u2080. While these binary hydrides exhibit remarkably high critical temperatures (Tc), their stabilization often requires pressures exceeding 150 GPa, limiting their practical scope. In this work, I propose a novel ternary system, Yttrium-Carbon-Hydride (Y—C—H), as a promising candidate for high-Tc superconductivity at reduced pressures. Based on Density Functional Theory (DFT) and evolutionary algorithm predictions, I identify a clathrate-like, face-centered cubic phase with an approximate composition of YCu2080.u2082Hu2081u2080 that is dynamically stable above 50 GPa. My calculations indicate a strong electron-phonon coupling mechanism, primarily driven by the high-frequency hydrogen vibrations, leading to a predicted Tc of up to 220 K at 100 GPa. I further detail a comprehensive experimental synthesis protocol using a diamond anvil cell (DAC) with in-situ laser heating and characterization, providing a roadmap for the empirical validation of this theoretically proposed material.
Category: Condensed Matter
[3] viXra:2511.0034 [pdf] submitted on 2025-11-09 03:30:06
Authors: Paul Hasselbring
Comments: 17 Pages. (Note by viXra Admin: Please submit article written with AI assistance to ai.viXra.org)
The recent observation of long-range electronic coherence in the kagome metal CsVu2083Sbu2085 below T' ≈ 30 K [Guo et al., Nature 647, 68-73 (2025)] presents a fundamental challenge to conventional condensed matter theory: how can coherent charge transport emerge over micron-scale distances in a material with sub-micron mean free paths, absent superconductivity? Here we demonstrate that WaveCode substrate theory—a geometric framework treating matter as interference patterns in a universal substrate—quantitatively explains this phenomenon without free parameters. Using Hasselbring Equations XVII (shell interference coupling) and LXIII (phase-lock coherence), we achieve R² = 0.989 agreement with experimental temperature-dependent oscillation amplitudes and correctly predict the coherence onset temperature Tcrit = 25.6 ± 1.3 K, consistent with experimental T' = 30 K. Our model unifies seven independent experimental probes (STM, μSR, NMR, transport, Nernst effect) through a single mechanism: geometric frustration in the kagome lattice enhances substrate-mediated phase-locking, enabling macroscopic coherence. We extend predictions to related kagome metals KVu2083Sbu2085 and RbVu2083Sbu2085, providing testable forecasts for their coherence behavior. This work establishes geometry as a fundamental design principle for engineering quantum coherence in correlated materials.
Category: Condensed Matter
[2] viXra:2511.0021 [pdf] submitted on 2025-11-06 02:39:56
Authors: Farid Abrari
Comments: 21 Pages. (Note by viXra Admin: Please submit article written with AI assistance to ai.viXra.org)
The combined theory of Special Relativity and Quantum Mechanics (c-SRQM) suggests the existence of a Primordial Stem Particle (PSP) whose rest mass m_bar is thought to be the cutoff limit for massless particles. At its condensed state of various quantum energy levels, the PSP is thought to be the sole constituent of black holes singularity, and in its free state, the PSP is thought to permeate the entire universe as a relic left from the Big Bang. The c-SRQM theory also suggests a physical limit a_u=c^2/A for acceleration, and with that, arrives at the concept of the Unit Black Hole (UBH) with mass M_1=A c^2/(4G) whose gravitational pull at the event horizon of diameter A is equal to a_u. The PSP constituents of a stand-alone UBH have the spatial uncertainty delta_x=A, thereby confining the particles to the very surface of the UBH event horizon. For larger black holes with index b>1 and mass M_b > M_1, a layered internal structure emerges comprising of b concentric spherical shells. The quantum index of constituents of each shell matches their shell number: the innermost shell 1, ie. UBH, is occupied by the PSPs at quantum energy level n=1, the following shell 2 is occupied by the PSPs at quantum energy level n=2, and so on until the outermost shell b which is occupied by the PSPs at quantum energy level n=b. These concentric spherical shells create the core or the physical singularity of black holes, a structure somewhat similar to but far simpler than the electron shells in the atomic structure of ordinary matter. A set of LIGO-Virgo Gravitational Wave data is used to constrain the UBH mass median to 7.402E23 (kg) and its core diameter to 2.197 (mm). The resulting PSP mass is constrained to a median of 1.006E-39 (kg).
Category: Condensed Matter
[1] viXra:2511.0004 [pdf] submitted on 2025-11-01 06:35:13
Authors: Ipsita Mandal
Comments: 6 Pages.
Fermi arcs appear as the surface states at the boundary of a three-dimensional topological semimetal with the vacuum, reflecting the Chern number ($mathcal C$) of a nodal point in the momentum space, which represents singularities (in the form of monopoles) of the Berry curvature. They are finite arcs (rather than closed curves), attaching/reattaching with the bulk-energy states at the tangents of the projections of the Fermi surfaces of the bands meeting at the nodes. The number of Fermi arcs grazing onto the tangents of the outermost projection equals $mathcal C$, revealing the intrinsic topology of the underlying bandstructure, which can be visualised in experiments like ARPES. Here we outline a generic procedure to compute these states for generic nodal points, (1) whose degeneracy might be twofold or multifold; and (2) the associated bands might exhibit isotropic or anisotropic, linear- or nonlinear-in-momentum dispersion. This also allows us to determine whether we should get any Fermi arcs at all for $mathcal C = 0$, when the nodes host ideal dipoles.
Category: Condensed Matter
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