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Negative resistance state in superconducting NbSe(2) induced by 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 dec...

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Detalles Bibliográficos
Autores principales: Yokoi, Masahiko, Fujiwara, Satoshi, Kawamura, Tomoya, Arakawa, Tomonori, Aoyama, Kazushi, Fukuyama, Hiroshi, Kobayashi, Kensuke, Niimi, Yasuhiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7442479/
https://www.ncbi.nlm.nih.gov/pubmed/32937360
http://dx.doi.org/10.1126/sciadv.aba1377
Descripción
Sumario: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.