Negative resistance state in superconducting NbSe${}_2$ induced by surface acoustic waves

Abstract

We report a negative resistance, namely, a voltage drop along the opposite direction of a current flow, in the superconducting gap of NbSe${}_2$ thin films under the irradiation of surface acoustic waves (SAWs). The amplitude of the negative resistance becomes larger by increasing the SAW power and decreasing temperature. As one possible scenario, we propose that soliton-antisoliton pairs in the charge density wave of NbSe${}_2$ modulated by the SAW serve as a time-dependent capacitance in the superconducting state, leading to the dc negative resistance. The present experimental result would provide a previously unexplored way to examine nonequilibrium manipulation of the superconductivity.

arXiv comment25 pages, 4 figures

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• Gate-tunable quantum acoustoelectric transport in graphene
• Fractal and subharmonic responses driven by surface acoustic waves during charge density wave sliding
• Electron qubits surfing on acoustic waves: review of recent progress
• Surface-acoustic-wave-induced unconventional superconducting pairing
• Acoustic spin current generation in superconductors
• Generation of a single-cycle surface acoustic wave pulse on LiNbO${}_3$ for application to thin film materials
• Observation of Shapiro Steps in the Charge Density Wave State Induced by Strain on a Piezoelectric Substrate