Dynamical vortex phase diagram of 2D superconductivity in gated MoS2

Abstract

Recent discoveries of two-dimensional (2D) superconductors have uncovered various new aspects of physical properties including vortex matter. In this paper, we report transport properties and a dynamical phase diagram at zero magnetic field in ion-gated MoS2. In addition to the universal jump in the current-voltage characteristic showing unambiguous evidence of the Berezinskii-Kosterlitz-Thouless (BKT) transition, we observed multiple peaks in the temperature- and current-derivative of the electrical resistance, based on which a dynamical phase diagram in the current-temperature plane was constructed. We found current-induced dynamical states of vortex-antivortex pairs, containing that with the phase slip line. Also, we present a global phase diagram of vortices in gated MoS2 which captures the nature of vortex matter of clean 2D superconductors.

31 pages, 7 figures

References in corpus (3)

• Highly crystalline 2D superconductors
• Imaging of super-fast dynamics and flow instabilities of superconducting vortices
• Rearrangement of the vortex lattice due to instabilities of vortex flow

Cited by in corpus (8)

• Phase diagram of superconducting vortex ratchet motion in a superlattice with noncentrosymmetry
• Flux-flow instability across Berezinskii Kosterlitz Thouless phase transition in KTaO${}_3$ (111) based superconductor
• Picosecond Trajectory of Two-dimensional Vortex Motion in FeSe${}_{0.5}$Te${}_{0.5}$ Visualized by Terahertz Second Harmonic Generation
• Nonlinear diode effect and Berezinskii-Kosterlitz-Thouless transition in purely two-dimensional noncentrosymmetric superconductors
• Two-dimensional superconducting diode effect in topological insulator/superconductor heterostructure
• Effects of vortex and antivortex excitations in underdoped Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$ bulk single crystals
• Transient vortex dynamics and evolution of Bose metal from a 2D superconductor on MoS${}_2$
• Superconducting Diode Effect in Gradiently Strained Nb0.5Ti0.5N Films