Emergence of Topological Superconductivity in Doped Topological Dirac Semimetals under Symmetry-Lowering Lattice Distortions
arXiv:2107.06806 · doi:10.1038/s41598-021-97982-1
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 lattice distortions and superconducting pairing interactions, the unconventional inversion-odd-parity superconductivity can be either topological nodal superconductivity hosting a flat SABS or topological crystalline superconductivity hosting a gapless SABS. Remarkably, the lattice distortions increase the superconducting critical temperature, which is consistent with the experiments. Our work opens a pathway to explore and control pressure-induced topological superconductivity in doped topological semimetals.
arXiv comment26 + 14 pages, 8 + 2 figures
References in corpus (49)
- Topological Insulators
- Topological insulators and superconductors
- Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
- Topological Insulators in Three Dimensions
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Classification of topological insulators and superconductors in three spatial dimensions
- Classification of topological quantum matter with symmetries
- Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
- Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
- Topological Materials: Weyl Semimetals
- Dirac semimetal in three dimensions
- Topological nodal semimetals
- Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
- Topological superconductors: a review
- Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal CdAs
- Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
- Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
- Experimental Realization of a Three-Dimensional Dirac Semimetal
- Phase transition between the quantum spin Hall and insulator phases in 3D: emergence of a topological gapless phase
- Observation of the chiral magnetic effect in ZrTe5
- Classification of stable three-dimensional Dirac semimetals with nontrivial topology
- Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
- Odd-Parity Topological Superconductors: Theory and Application to CuBiSe
- Recent developments in transport phenomena in Weyl semimetals
- Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials
- Dirac Fermions in Solids - from High Tc cuprates and Graphene to Topological Insulators and Weyl Semimetals
- Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
- Dirac vs. Weyl in topological insulators: Adler-Bell-Jackiw anomaly in transport phenomena
- Observation of superconductivity in 3D Dirac semimetal Cd3As2 crystal
- Optical spectroscopy study of three dimensional Dirac semimetal ZrTe
- Topological superconductivity in bilayer Rashba system
- Weyl, Dirac and high-fold chiral fermions in topological quantum materials
- Topological Mirror Superconductivity
- Unconventional Superconductivity at Mesoscopic Point-contacts on the 3-Dimensional Dirac Semi-metal CdAs
- Topological superconductivity in Dirac semimetals
- Bulk Dirac points in distorted spinels
- Dispersion of Fermi arcs in Weyl semimetals and their evolutions to Dirac cones
- Universal phase diagrams for the quantum spin Hall systems
- Topological Blount's theorem of odd-parity superconductors
- Z_2 and Chiral Anomalies in Topological Dirac Semimetals
- Classification of stable Dirac and Weyl semimetals with reflection and rotational symmetry
- Topological zero modes and Dirac points protected by spatial symmetry and chiral symmetry
- Z topology and superconductivity from symmetry lowering of a 3D Dirac Metal AuPb
- Superconductivity in doped Dirac semimetals
- Superconductivity in topologically nontrivial material Au2Pb
- Strain-engineered Majorana Zero Energy Modes and ϕ0 Josephson State in Black Phosphorus
- Temperature - Pressure phase diagram of the cubic Laves phase AuPb
- Zero Bias Conductance Peak in Dirac Semimetal-Superconductor Devices
- Fully gapped superconducting state in Au2Pb: a natural candidate for topological superconductor