Authors: Yuanjie Huang
As is known, the piezoelectric effect and electrostrictive effect exist in some ceramics and dielectric materials. However, such effect has never been discovered in conventional metals before. Here, strain-induced electric effect in conventional metals, named after Professor Yuheng Zhang, was first uncovered theoretically in this work. This effect gives several interesting and surprising predictions for metals as follows: 1) conduction electrons in metals no longer obey Einstein diffusion relation but satisfy a new relation given in this work; 2) a metal with strain gradients at a uniform temperature is no longer an equal-electric potential body even without any external electromagnetic disturbances; 3) a metal possessing non-uniform strains may behave as an ideal p-n junction, blocking electric current completely if the applied reverse-biased voltage is not large enough; 4) the long-standing physical puzzle for thermoelectric effect of metals, the positive sigh of Seebeck coefficient for metals, is unraveled by means of Yuheng Zhang coefficient, a newly found vital coefficient induced by both thermal expansion and Yuheng Zhang effect; 5) a notable electric voltage maintains across the shock wave front in metals; 6) an electric voltage appears between two phases when phase transition happens for metals, offering a new probe to detect phase transions. In all, this effect may expand one's fundamental knowledge on metals and find applications in various fields.
Comments: 21 Pages.
[v1] 2017-07-10 19:13:14
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