Superconductivity in three-dimensional interacting doped topological insulators
arXiv:2407.08736 · doi:10.1103/PhysRevB.110.L201301
Abstract
Three-dimensional doped Dirac insulators foster simply connected (in both topological and trivial regimes) and annular (deep inside the topological regime) Fermi surfaces (FSs) in the normal state, and allow on-site repulsions among fermions with opposite spin () and parity () eigenvalues. From an unbiased leading-order (one-loop) renormalization group analysis, controlled by a suitable expansion, we show that this system develops a strong propensity toward the nucleation of scalar -wave and odd-parity pseudoscalar -wave pairings, favored by repulsive and interactions, respectively, irrespective of the underlying FS topology. Our results can be pertinent for the observed superconductivity in various doped narrow gap semiconductors, and the theoretical foundation can readily be applied to investigate similar phenomenon in various doped topological materials.
Published version in PRB Letter: 6 Pages, 1 Figure, 2 Tables (Supplemental Material as ancillary file)
References in corpus (10)
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Topological Insulators with Inversion Symmetry
- Theory of interacting electrons on the honeycomb lattice
- Bulk superconducting phase with a full energy gap in the doped topological insulator Cu_xBi_2Se_3
- Odd-parity topological superconductor with nematic order: Application to CuxBi2Se3
- Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
- Odd-Parity Pairing and Topological Superconductivity in a Strongly Spin-Orbit Coupled Semiconductor
- Extended Hubbard model in undoped and doped monolayer and bilayer graphene: Selection rules and organizing principle among competing orders
- Emergent chiral symmetry in a three-dimensional interacting Dirac liquid
- Interaction-driven first-order and higher-order topological superconductivity