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J. Phys. Soc. Jpn. 81 (2012) 043601 (4 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Specific Heat of the Multilayered Massless Dirac Fermion System

Takako Konoike, Kazuhito Uchida, and Toshihito Osada

Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan

(Received January 31, 2012; Accepted February 9, 2012; Published March 5, 2012)

We have measured the specific heat of the multilayered massless Dirac fermion system α-(BEDT-TTF)2I3 under pressure. The temperature dependence of the specific heat is almost quadratic at low temperature, suggesting massless Dirac dispersion in this system. In a magnetic field, the specific heat shows anomalous behavior, which can be understood by assuming the zero-mode Landau level characteristic of the Dirac fermion system and its spin splitting. These results are in good agreement with the reported magnetoresistance. ©2012 The Physical Society of Japan

URL: http://jpsj.ipap.jp/link?JPSJ/81/043601/
DOI: 10.1143/JPSJ.81.043601


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