Renormalization Effects on Quasi-Two-Dimensional Organic Conductor α-(BEDT-TTF)2I3

被引：26
|
作者：
Isobe, Hiroki [1 ]
Nagaosa, Naoto [1 ,2 ,3 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] RIKEN, Cross Correlated Mat Res Grp CMRG, Wako, Saitama 3510198, Japan
[3] RIKEN, Correlated Electron Res Grp CERG, ASI, Wako, Saitama 3510198, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2012年 / 81卷 / 11期
基金：
日本科学技术振兴机构;
关键词：
organic conductor; alpha-(BEDT-TTF)(2)I-3; tilted Dirac cone; renormalization group; GRAPHENE; (BEDT-TTF)2I3; PRESSURE; PHASE;
D O I：
10.1143/JPSJ.81.113704
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The quasi-two-dimensional organic semiconductor alpha-(BEDT-TTF)(2)I-3 [BEDT-TTF: bis(ethylenedithio)tetrathiafulvalene] has an anisotropic linear dispersion with a zero energy gap near the Fermi level. Owing to the vanishing density of states at the Fermi level, the Coulomb interaction is unscreened in this material. We theoretically study the effect of the long-range Coulomb interaction and the low-energy/long-wavelength behavior of alpha-(BEDT-TTF)(2)I-3 using the renormalization group analysis. The nearly logarithmic enhancement of the velocity reshapes tilted Dirac cones, and changes the low-temperature behavior. We also show the theoretical calculation for the site-selective spin susceptibility, which can be measured in an NMR experiment.
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页数：3
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