Transport Phenomena in Multilayered Massless Dirac Fermion System α-(BEDT-TTF)2I3

Crystals

Naoya Tajima¹  Yutaka Nishio² 

[1] Department of Physics, Toho University, Miyama 2-2-1, Funabashi-shi, Chiba JP-274-8510, Japan;

关键词: Dirac fermion;    transport phenomena;    α-(BEDT-TTF)₂I₃;    inter-band effects of the magnetic field;    zero-mode Landau level;    ν = 0 quantum Hall effect;   

DOI  :  10.3390/cryst2020643

来源: mdpi

【 摘 要 】

A zero-gap state with a Dirac cone type energy dispersion was discovered in an organic conductor α-(BEDT-TTF)₂I₃ under high hydrostatic pressures. This is the first two-dimensional (2D) zero-gap state discovered in bulk crystals with a layered structure. In contrast to the case of graphene, the Dirac cone in this system is highly anisotropic. The present system, therefore, provides a new type of massless Dirac fermion system with anisotropic Fermi velocity. This system exhibits remarkable transport phenomena characteristic to electrons on the Dirac cone type energy structure.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.