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arXiv · 2006.10749

Dynamical vortex phase diagram of 2D superconductivity in gated MoS2

Yu Saito·Yuki M. Itahashi·Tsutomu Nojima·Yoshihiro Iwasa
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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.

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Yu Saito, Yuki M. Itahashi, Tsutomu Nojima, Yoshihiro Iwasa. 2020-06-18. Dynamical vortex phase diagram of 2D superconductivity in gated MoS2. https://doi.org/10.1103/physrevmaterials.4.074003

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