Band structure of superconducting Dirac electron systems

International Workshop on Dirac Electrons in Solids 2015

Kuraya, Takahiro^1 ; Fuseya, Yuki^1

Department of Engineering Science, University of Electro-Communications, Chofu, Tokyo

182-8585, Japan^1

关键词: Dirac electrons;    Equal energy;    First-principles calculation;    Generalized gradient approximations;    Low energy regions;    Spin orbit interactions;    Superconducting mechanism;    Tight binding model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/603/1/012025/pdf
DOI  :  10.1088/1742-6596/603/1/012025

来源: IOP

【 摘 要 】

The band structures of PbTe and SnTeare theoretically investigated. First- principles calculation is carried out on the basis of the density functional theory within the generalized gradient approximations. Then, in order to study the fine band structures in the low energy region, the tight-binding model is introduced based on the most localized Wannierfunctions derived from the first-principles calculations. It is found that the topology of the equal energy surface is different between PbTe and SnTe due to the spin-orbit interaction. The information of the topologically different Fermi surface will be important to study the superconducting mechanism on doped PbTeand SnTe.