{"id":3818,"date":"2022-01-14T14:49:00","date_gmt":"2022-01-14T05:49:00","guid":{"rendered":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/?p=3818"},"modified":"2022-11-07T14:57:56","modified_gmt":"2022-11-07T05:57:56","slug":"3818","status":"publish","type":"post","link":"https:\/\/www.phys.s.u-tokyo.ac.jp\/en\/news\/3818\/","title":{"rendered":"Large Diamagnetism and Electromagnetic Duality in Two-Dimensional Dirac Electron System"},"content":{"rendered":"\n

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A Dirac electron system in solids mimics relativistic quantum physics that is compatible with Maxwell\u2019s 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\u00a0e<\/span><\/span><\/span>2<\/span><\/span><\/span><\/span>\/<\/span><\/span>h<\/span><\/span><\/span><\/span><\/span>\u00a0per plane for the new 2D Dirac organic conductor,\u00a0\u03b1<\/span><\/span>\u2212<\/span><\/span><\/span>(<\/span><\/span>BETS<\/span><\/span>)<\/span><\/span><\/span><\/span>2<\/span><\/span><\/span><\/span><\/span>I<\/span><\/span><\/span><\/span>3<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>, 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.<\/p>\n

See below for more information.<\/p>\n