Large Diamagnetism and Electromagnetic Duality in Two-Dimensional Dirac Electron System
News 2022/01/14
A Dirac electron system in solids mimics relativistic quantum physics that is compatible with Maxwell’s equations, with which we anticipate unified electromagnetic responses. We find a large orbital diamagnetism only along the interplane direction and a nearly temperature-independent electrical conductivity of the order of e2/h per plane for the new 2D Dirac organic conductor, α−(BETS)2I3, where BETS is bis(ethylenedithio)tetraselenafulvalene. Unlike conventional electrons in solids whose nonrelativistic effects bifurcate electric and magnetic responses, the observed orbital diamagnetism scales with the electrical conductivity in a wide temperature range. This demonstrates that an electromagnetic duality that is valid only within the relativistic framework is revived in solids.
See below for more information.
- Aritcle URL : https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.128.027201
- RIKEN : https://www.riken.jp/en/