Flux-flow instability in 2H-NbSe2 superconducting thin crystals stamped on SiO2/Si substrates
Flux-flow instability in 2H-NbSe2 superconducting thin crystals stamped on SiO2/Si substrates
复制标题
SiO2/Si 基底上冲压的 2H-NbSe2 超导薄晶体中的通量流动不稳定性
DOI：
10.1088/1742-6596/969/1/012073
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Kokubo N
中科院分区：
文献类型：
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作者：
Yoshida J;Ando H;Kokubo N
研究了SiO_2/Si衬底上2H-NbSe_2超导薄晶混合态的非线性磁通流动。磁通流动行为中的非线性表现为电流-电压特性中的向上弯曲和随后的电压跳跃。结果在修正的Larkin-Ovchinnikov模型框架内进行了分析，包括估算准粒子在晶体中的非弹性驰豫时间和晶体与SiO2/Si衬底之间的换热系数。这一分析提供了对晶体-衬底界面的声学匹配质量的洞察。
We have investigated the nonlinear flux flow in the mixed state of 2H-NbSe 2 superconducting thin crystals stamped on SiO 2/Si substrates. The nonlinearity in the flux flow behavior is marked with upward bending and subsequent voltage jump in the current-voltage characteristics. The results were analyzed within the framework of a modified Larkin-Ovchinnikov model, including the estimation of inelastic relaxation time of quasiparticles in the crystal and heat transfer coefficient between the crystal and SiO 2/Si substrate. The analysis provides an insight into the quality of acoustic match at the crystal-substrate interface.