Format

Send to

Choose Destination
Nat Commun. 2018 Apr 12;9(1):1427. doi: 10.1038/s41467-018-03888-4.

Tuning Ising superconductivity with layer and spin-orbit coupling in two-dimensional transition-metal dichalcogenides.

Author information

1
Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213, USA. sergio@phys.cmu.edu.
2
Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.
3
School of Applied and Engineering Physics, Cornell University, Ithaca, NY, 14853, USA.
4
Department of Physics, University of Washington, Seattle, WA, 98195, USA.
5
Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0044, Japan.
6
Institute for Quantum Computing and Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
7
Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA.
8
Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213, USA. bmhunt@andrew.cmu.edu.

Abstract

Systems simultaneously exhibiting superconductivity and spin-orbit coupling are predicted to provide a route toward topological superconductivity and unconventional electron pairing, driving significant contemporary interest in these materials. Monolayer transition-metal dichalcogenide (TMD) superconductors in particular lack inversion symmetry, yielding an antisymmetric form of spin-orbit coupling that admits both spin-singlet and spin-triplet components of the superconducting wavefunction. Here, we present an experimental and theoretical study of two intrinsic TMD superconductors with large spin-orbit coupling in the atomic layer limit, metallic 2H-TaS2 and 2H-NbSe2. We investigate the superconducting properties as the material is reduced to monolayer thickness and show that high-field measurements point to the largest upper critical field thus reported for an intrinsic TMD superconductor. In few-layer samples, we find the enhancement of the upper critical field is sustained by the dominance of spin-orbit coupling over weak interlayer coupling, providing additional candidate systems for supporting unconventional superconducting states in two dimensions.

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center