Tunneling spectroscopy of few-monolayer<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>NbSe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>in high magnetic fields: Triplet superconductivity and Ising protection
Marko Kuzmanović, Tom Dvir, David LeBoeuf, Stefan Ilić, Menashe Haim, David Möckli, S. Krämer, Maxim Khodas, Manuel Houzet, Julia S. Meyer, M. Aprili, Hadar Steinberg, C. H. L. Quay
Abstract
Equal spin triplet pairs (ESTPs) of nuclei form the ground state of superfluid ${}^{3}$He. ESTPs of electrons have long been sought in superconducting systems. In layered transition metal dichalcogenides with 2$H$ structure, such as NbSe${}_{2}$, ESTP correlations have been predicted to arise from the interaction of the Ising spin-orbit field, which pins the internal spin axis of conventional singlet pairs out-of-plane, and an applied in-plane magnetic field. The tunneling spectroscopy study done here of bilayer NbSe${}_{2}$ shows experimental signatures of these ESTPs.