Higher-order topological superconductivity in monolayer WTe${}_2$ from repulsive interactions

Abstract

Superconductivity has been experimentally observed in monolayer WTe2, which in-plane field measurements suggested are of spin-triplet nature. Furthermore, it has been proposed that with a $p$-wave pairing, the material is a second-order topological superconductor with a pair of Majorana zero modes at the corners of a finite sample. We show that for a repulsive on-site interaction and sizable Fermi surfaces, the desired p-wave state arises naturally due to the Kohn-Luttinger mechanism, and indeed a finite superconducting sample hosts corner Majorana zero modes. We study the behavior of the critical temperature in response to external in-plane magnetic fields. We find an enhancement to the critical temperature that depends on the direction of the magnetic field, which can be directly verified experimentally.

References in corpus (55)

• Topological Insulators
• Topological insulators and superconductors
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Classification of topological quantum matter with symmetries
• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• Quantized Electric Multipole Insulators
• Search for Majorana fermions in superconductors
• Higher-Order Topological Insulators
• Majorana Zero Modes and Topological Quantum Computation
• Reflection symmetric second-order topological insulators and superconductors
• Realization of Quantum Spin Hall State in Monolayer 1T'-WTe2
• Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
• Edge conduction in monolayer WTe2
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Second-order topological insulators and superconductors with an order-two crystalline symmetry
• Electrically Tunable Low Density Superconductivity in a Monolayer Topological Insulator
• Gate-induced superconductivity in a monolayer topological insulator
• Higher-order bulk-boundary correspondence for topological crystalline phases
• Superconductivity in the repulsive Hubbard model: an asymptotically exact weak-coupling solution
• Sublattice Interference in the Kagome Hubbard Model
• Kohn-Luttinger Superconductivity in Twisted Bilayer Graphene
• Imaging currents in HgTe quantum wells in the quantum spin Hall regime
• Signature of strong spin-orbital coupling in the large non-saturating magnetoresistance material WTe2
• Weak-Pairing Higher Order Topological Superconductors
• Observation of topological states residing at step edges of WTe2
• Imaging Quantum Spin Hall Edges in Monolayer WTe2
• On the quantum spin Hall gap of monolayer 1T'-WTe2
• Josephson radiation from gapless Andreev bound states in HgTe-based topological junctions
• Direct Visualization of 2D Topological Insulator in Single-layer 1T'-WTe2
• Helical Hinge Majoranas in Iron-Based Superconductors
• Higher-order topological odd-parity superconductors
• Inversion-protected higher order topological superconductivity in monolayer WTe${}_2$
• Understanding topological phase transition in transition metal dichalcogenides
• Superconductivity from weak repulsion in hexagonal lattice systems
• Many body localization with long range interactions
• Interactions and superconductivity in heavily doped MoS2
• Effects of longer-range interactions on unconventional superconductivity
• Unconventional high-temperature superconductivity from repulsive interactions: theoretical constraints
• The influence of lattice termination on the edge states of the quantum spin Hall insulator monolayer $1T^{\prime }$-WTe${}_2$
• Band-structure effects on superconductivity in Hubbard models
• Custodial glide symmetry of quantum spin Hall edge modes in WTe${}_2$ monolayer
• Kohn-Luttinger superconductivity on two orbital honeycomb lattice
• Spin-triplet superconductivity from interband effect in doped insulators
• Triplet Superconductivity from Nonlocal Coulomb Repulsion in an Atomic Sn Layer Deposited onto a Si(111) Substrate
• Unconventional superconductivity due to interband polarization
• Determination of the spin axis in quantum spin Hall insulator monolayer WTe2
• Artificial Graphene: Unconventional Superconductivity in a Honeycomb Superlattice
• Unconventional superconductivity in the extended Hubbard model: Weak-coupling renormalization group
• Superconductivity on the brink of spin-charge order in doped honeycomb bilayer
• Odd momentum pairing and superconductivity in vertical graphene heterostructures
• Excitonic and superconducting orders from repulsive interaction on the doped honeycomb bilayer
• Higher-order topological superconductors from Weyl semimetals
• Phase diagram of the Kohn-Luttinger superconducting state for bilayer graphene
• Effect of the long-range Coulomb interaction on phase diagram of the Kohn-Luttinger superconducting state in idealized graphene

Cited by in corpus (6)

• Enhanced Kohn-Luttinger topological superconductivity in bands with nontrivial geometry
• Possible Sliding Regimes in Twisted Bilayer WTe${}_2$
• Topological Superconductivity in Monolayer T${}_{\text{d}}$-MoTe${}_2$
• Unconventional pairing in Ising superconductors: Application to monolayer NbSe${}_2$
• Unconventional superconductivity in monolayer transition metal dichalcogenides
• Quasiparticle Interference of Spin-Triplet Superconductors: Application to UTe${}_2$