We investigate the pressure effect on the layered Dirac fermion system, which is realized in quasi-two-dimensional organic compound {\alpha}-(BEDT-TTF)2I3. The trajectory of the contact points is investigated using the tight-binding model with the transfer integrals determined by X-ray diffraction experiments. Vanishing of the Dirac fermion spectrum, opening of the gap, and pressure dependence of inter-layer magnetoresistance are discussed.
@article{arxiv.1108.0791,
title = {Pressure effects on Dirac fermions in {\alpha}-(BEDT-TTF)2I3},
author = {Takahiro Himura and Takao Morinari and Takami Tohyama},
journal= {arXiv preprint arXiv:1108.0791},
year = {2011}
}
Comments
18 pages, 7 figures, Proceedings of the International Conference on Conducting Materials (ICoCoM2010) in Sousse, Tunisia, Nov 3-7 2010, submitted to Journal of Physics: Condensed Matter