Negative resistance state in superconducting NbSe 2 induced by surface acoustic waves
Negative resistance state in superconducting NbSe 2 induced by surface acoustic waves
复制标题
声表面波诱导超导NbSe 2 的负阻态
DOI：
10.1126/sciadv.aba1377
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发表时间：
2020
期刊：
影响因子：
13.6
通讯作者：
and Yasuhiro Niimi
中科院分区：
文献类型：
--
作者：
Masahiko Yokoi;Satoshi Fujiwara;Tomoya Kawamura;Tomonori Arakawa;Kazushi Aoyama;Hiroshi Fukuyama;Kensuke Kobayashi;and Yasuhiro Niimi
我们报道了在表面声波（saw）照射下nbse2薄膜超导间隙中的负电阻，即沿电流相反方向的电压降。随着SAW功率的增大和温度的降低，负电阻的幅值增大。作为一种可能的情况，我们提出了SAW调制的nbse2电荷密度波中的孤子-反孤子对在超导状态下作为时间相关电容，导致直流负电阻。目前的实验结果将提供一种以前未探索的方法来检查超导性的非平衡操纵。
We report a negative resistance, namely, a voltage drop along the opposite direction of a current flow, in the superconducting gap of NbSe2thin 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 NbSe2modulated 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.