Anomalously high supercurrent density in a two-dimensional topological material
arXiv:2301.11425 · doi:10.1103/PhysRevMaterials.7.L071801
Abstract
Ongoing advances in superconductors continue to revolutionize technology thanks to the increasingly versatile and robust availability of lossless supercurrent. In particular high supercurrent density can lead to more efficient and compact power transmission lines, high-field magnets, as well as high-performance nanoscale radiation detectors and superconducting spintronics. Here, we report the discovery of an unprecedentedly high superconducting critical current density (17 MA/cm2 at 0 T and 7 MA/cm2 at 8 T) in 1T'-WS2, exceeding those of all reported two-dimensional superconductors to date. 1T'-WS2 features a strongly anisotropic (both in- and out-of-plane) superconducting state that violates the Pauli paramagnetic limit signaling the presence of unconventional superconductivity. Spectroscopic imaging of the vortices further substantiates the anisotropic nature of the superconducting state. More intriguingly, the normal state of 1T'-WS2 carries topological properties. The band structure obtained via angle-resolved photoemission spectroscopy and first-principles calculations points to a Z2 topological invariant. The concomitance of topology and superconductivity in 1T'-WS2 establishes it as a topological superconductor candidate, which is promising for the development of quantum computing technology.
References in corpus (19)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
- Wannier90 as a community code: new features and applications
- EPW: Electron-phonon coupling, transport and superconducting properties using maximally localized Wannier functions
- Evidence of Ising pairing in superconducting NbSe atomic layers
- Two Dimensional Ising Superconductivity in Gated MoS
- Realization of Quantum Spin Hall State in Monolayer 1T'-WTe2
- Decoupling superconductivity and correlated insulators in twisted bilayer graphene
- Anisotropic Migdal-Eliashberg theory using Wannier functions
- Enhanced superconductivity in atomically thin TaS2
- Topological superconductivity in monolayer transition metal dichalcogenides
- Coexistence of Intrinsic Superconductivity and Topological Insulator State in Monoclinic Phase WS2
- Quantum-spin-Hall insulator with a large gap: single-layer 1T' WSe
- Unexpected two-fold symmetric superconductivity in few-layer NbSe
- Transport evidence of asymmetric spin-orbit coupling in fewlayer superconducting 1TdMoTe
- Investigations of the Core Structure of Magnetic Vortices in Type-II Superconductors by muSR
- 2D superconductivity and vortex dynamics in 1T-MoS2
- Phase slip lines in superconducting few-layer NbSe crystals