Inter-Band Effects of Magnetic Field on Hall Conductivity in Multi Layered Massless Dirac Fermion System $α$-(BEDT-TTF)$_2$I$_3$

Details Inter-Band Effects of Magnetic Field on Hall Conductivity in Multi Layered Massless Dirac Fermion System $α$-(BEDT-TTF)$_2$I$_3$ Inter-Band Effects of Magnetic Field on Hall Conductivity in Multi Layered Massless Dirac Fermion System $α$-(BEDT-TTF)$_2$I$_3$

2012-01-13

arxiv.org/abs/1201.2728v1

Phys. Rev. B 85, 033401 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 page, 4 figures

Scientific paper

10.1103/PhysRevB.85.033401

We have discovered two-dimensional zero-gap material with a layered structure in the organic conductor $\alpha$-(BEDT-TTF)$_2$I$_3$ under high hydrostatic pressure. In contrast to graphene, the electron-hole symmetry is not good except at the vicinity of the Dirac points. Thus, temperature dependence of the chemical potential, $\mu$, plays an important role in the transport in this system. The experimental formula of $\mu$ is revealed. We succeeded in detecting the inter-band effects of a magnetic field on the Hall conductivity when $\mu$ passes the Dirac point.

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