High Pressure Thermal Measurements in Organic Dirac Fermion System

Abstract

 Kazuhito UCHIDA 2 長田 俊人  Toshihito OSADA 2 It is becoming evident that Dirac fermions are present in several materials other than graphene. The organic con-ductor a ( BEDT  TTF ) 2 I 3 is known to be a first bulk crystal which realizes a massless Dirac fermion system under high pressure. By taking advantage of its bulk nature, we experimentally study the thermodynamic and ther-moelectric properties of Dirac fermions by using this system. Here, we will show the experimental technique and experimental results of the specific heat and thermopower of a ( BEDT  TTF ) 2 I 3 under high pressure. ［ organic conductor, clamp-type pressure cell,