Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions.

ABSTRACT: Recently, unconventional superconductivity having a zero-bias conductance peak is reported in doped topological Dirac semimetal (DSM) with lattice distortion. Motivated by the experiments, we theoretically study the possible symmetry-lowering lattice distortions and their effects on the emergence of unconventional superconductivity in doped topological DSM. We find four types of symmetry-lowering lattice distortions that reproduce the crystal symmetries relevant to experiments from the group-theoretical analysis. Considering inter-orbital and intra-orbital electron density-density interactions, we calculate superconducting phase diagrams. We find that the lattice distortions can induce unconventional superconductivity hosting gapless surface Andreev bound states (SABS). Depending on the la

SUBMITTER: Cheon S 

PROVIDER: S-EPMC8448755 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature