Intrinsic chiral topological superconductor thin films
arXiv:2312.10453 · doi:10.1103/PhysRevB.108.235147
Abstract
Superconductors (SCs) with nontrivial topological band structures in the normal state have been discovered recently in bulk materials. When such SCs are made into thin films, quantum tunneling and Cooper pairing take place between the topological surface states (TSSs) on the opposing surfaces. Here, we find that chiral topological superconductivity with spontaneous time-reversal symmetry breaking emerges on the surface of such thin film SCs. There is a mirror symmetry that protects a novel nonunitary orbital and spin triplet pairing of the TSS. In the mirror diagonal space, the chiral topological SC manifests as two independent chiral -wave spin-triplet pairing states, in which each is a two-dimensional superconducting analog of the Anderson-Brinkman-Morel state in superfluid He with in-plane exchange fields. A rich topological phase diagram governed by the nontrivial topological invariant is obtained with gapless chiral Majorana edge modes and anyonic Majorana vortices. We further construct a three dimensional lattice model with a topological band structure and SC pairings, which is motivated by Fe-based SCs such as Fe(Te,Se). We demonstrate the realization of the proposed intrinsic chiral topological superconductor in the quasi-two-dimensional thin-film limit. Our findings enable thin-film SCs with nontrivial band structures as a single-material platform for intrinsic chiral topological superconductivity with both vortex and boundary Majorana excitations for topological quantum device making.
arXiv comment12 pages, 9 figures, This paper supersedes arXiv:2003.11752
References in corpus (53)
- Topological Insulators
- Topological insulators and superconductors
- Fault-tolerant quantum computation by anyons
- Non-Abelian Anyons and Topological Quantum Computation
- Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
- Paired states of fermions in two dimensions with breaking of parity and time-reversal symmetries, and the fractional quantum Hall effect
- Majorana Zero Modes and Topological Quantum Computation
- CsVSb: a topological kagome metal with a superconducting ground state
- Model Hamiltonian for Topological Insulators
- Odd-Parity Topological Superconductors: Theory and Application to CuBiSe
- Surface States of the Topological Insulator Bi_{1-x}Sb_x
- Evidence for Majorana bound state in an iron-based superconductor
- Observation of topological superconductivity on the surface of an iron-based superconductor
- Chiral Topological Superconductor From the Quantum Hall State
- Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
- Chiral Majorana edge state in a quantum anomalous Hall insulator-superconductor structure
- Pronounced drop of O NMR Knight shift in superconducting state of SrRuO
- Detecting Non-Abelian Statistics in the nu=5/2 Fractional Quantum Hall State
- Proposed experiments to probe the non-abelian ν=5/2 quantum Hall state
- Chiral Superconductors
- Topological Quantum Computation Based on Chiral Majorana Fermions
- Topological nature of FeSeTe superconductor
- Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te)
- Topological superconductivity on the surface of Fe-based superconductors
- Multiple topological states in iron-based superconductors
- Observation of a Robust Zero-energy Bound State in Iron-based Superconductor Fe(Te,Se)
- Odd-parity topological superconductor with nematic order: Application to CuxBi2Se3
- Robust and clean Majorana zero mode in the vortex core of high-temperature superconductor (Li0.84Fe0.16)OHFeSe
- Topological superconductivity in bilayer Rashba system
- Topological Mirror Superconductivity
- Superconducting Topological Surface States in Non-centrosymmetric Bulk Superconductor PbTaSe2
- Helical Hinge Majoranas in Iron-Based Superconductors
- Topological Characters in Fe(TeSe) thin films
- Non-Majorana Origin of the Half-Quantized Conductance Plateau in Quantum Anomalous Hall Insulator and Superconductor Hybrid Structures
- Symmetry-Protected Majorana Fermions in Topological Crystalline Superconductors: Theory and Application to Sr2RuO4
- Conductance and noise signatures of Majorana backscattering
- Magnetic field-tuned Aharonov-Bohm oscillations and evidence for non-Abelian anyons at v=5/2
- A new Majorana platform in an Fe-As bilayer superconductor
- Recent progress on superconductors with time-reversal symmetry breaking
- Topological Dirac States and Pairing Correlations in the Non-Centrosymmetric Superconductor PbTaSe2
- A mechanism of conductance plateau without 1D chiral Majorana fermions
- Quantum anomalous vortex and Majorana zero mode in iron-based superconductor Fe(Te,Se)
- Dirac-Fermion-Induced Parity Mixing in Superconducting Topological Insulators
- Observation of magnetic adatom-induced Majorana vortex and its hybridization with field-induced Majorana vortex in an iron-based superconductor
- Intrinsic Time-reversal-invariant Topological Superconductivity in Thin Films of Iron-based Superconductors
- Topological Superconductivity in an s-wave Superconductor and Its Implication to Iron-based Superconductors
- Field-free platform for topological zero-energy mode in superconductors LiFeAs and PbTaSe
- Extended Hubbard model of superconductivity driven by charge fluctuations in iron-pnictides
- Highly tunable time-reversal-invariant topological superconductivity in topological insulator thin films
- Chiral Superconductivity in Thin Films of doped BiSe
- Topological Larkin-Ovchinnikov phase and Majorana zero mode chain in bilayer superconducting topological insulator films
- Proximity induced time-reversal topological superconductivity in Bi2Se3 films without phase tuning
- Universal topological quantum computation with strongly correlated Majorana edge modes