Negative resistance state in superconducting NbSe2 induced by surface acoustic waves

A negative resistance state is realized in a superconducting gap of NbSe 2 by irradiating surface acoustic waves. 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 a...

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Bibliographic Details
Published in:Science advances 2020-08, Vol.6 (34)
Main Authors: Yokoi, Masahiko, Fujiwara, Satoshi, Kawamura, Tomoya, Arakawa, Tomonori, Aoyama, Kazushi, Fukuyama, Hiroshi, Kobayashi, Kensuke, Niimi, Yasuhiro
Format: Article
Language:English
Subjects:
Applied Physics
Materials Science
SciAdv r-articles
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Summary:A negative resistance state is realized in a superconducting gap of NbSe 2 by irradiating surface acoustic waves. 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.
ISSN:2375-2548
DOI:10.1126/sciadv.aba1377