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Crystals 2012, 2(2), 643-661; doi:10.3390/cryst2020643
Review

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

* ,
 and
Department of Physics, Toho University, Miyama 2-2-1, Funabashi-shi, Chiba JP-274-8510, Japan
* Author to whom correspondence should be addressed.
Received: 14 March 2012 / Revised: 28 May 2012 / Accepted: 29 May 2012 / Published: 11 June 2012
(This article belongs to the Special Issue Molecular Conductors)
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Abstract

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.
Keywords: Dirac fermion; transport phenomena; α-(BEDT-TTF)2I3; inter-band effects of the magnetic field; zero-mode Landau level; ν = 0 quantum Hall effect Dirac fermion; transport phenomena; α-(BEDT-TTF)2I3; inter-band effects of the magnetic field; zero-mode Landau level; ν = 0 quantum Hall effect
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Tajima, N.; Nishio, Y.; Kajita, K. Transport Phenomena in Multilayered Massless Dirac Fermion System α-(BEDT-TTF)2I3. Crystals 2012, 2, 643-661.

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