Chirality effect on superconductivity

International Workshop on Dirac Electrons in Solids 2015

Morinari, Takao^1

Graduate School of Human and Environmental Studies, Kyoto University, Kyoto

606-8501, Japan^1

关键词: Dirac fermions;    Electron systems;    Nodal structures;    Pairing interactions;    Superconducting gaps;    Superconducting state;    Wave vector;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/603/1/012007/pdf
DOI  :  10.1088/1742-6596/603/1/012007

来源: IOP

【 摘 要 】

We consider electron systems characterized by chirality, such as Dirac fermion systems and iron-based superconductors. We investigate the chirality effect on superconducting states in such a system. We show that chirality effect leads to a nodal structure in the superconducting gap function. The node creation mechanism depends on the wave vector q of the pairing interaction and vorticity that characterizes chirality of electrons. The node creation effect due to chirality is significant for the case of Dirac fermions with q = (π, 0) and for the case of iron-based superconductors with q = (π,π).