Superfluid response of an atomically thin gate-tuned van der Waals superconductor.

ABSTRACT: A growing number of two-dimensional superconductors are being discovered in the family of exfoliated van der Waals materials. Due to small sample volume, the superfluid response of these materials has not been characterized. Here, we use a local magnetic probe to directly measure this key property of the tunable, gate-induced superconducting state in MoS₂. We find that the backgate changes the transition temperature non-monotonically whereas the superfluid stiffness at low temperature and the normal state conductivity monotonically increase. In some devices, we find direct signatures in agreement with a Berezinskii-Kosterlitz-Thouless transition, whereas in others we find a broadened onset of the superfluid response. We show that the observed behavior is consistent with disorder

SUBMITTER: Jarjour A 

PROVIDER: S-EPMC10097715 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature