Relaxation of Coherent Excited States of a Superconductor to a Superconducting Reservoir
Relaxation of Coherent Excited States of a Superconductor to a Superconducting Reservoir
复制标题
超导体相干激发态弛豫至超导储层
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Semenov
中科院分区：
文献类型：
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作者：
I. Devyatov;A. Semenov
超导电池组的弛豫对在微波信号照射下出现的超导体的相干激发态的影响[A.V.Semenov等，Phys.莱特牧师。117,047002(2016年)]，并可能被破坏，因为隧道松弛到正常的金属储集层[A.V.塞门诺夫等，http://arxiv.org/abs/1801.03311]已进行了理论研究。以隧道中与扩散超导电池组接触的扩散超导薄带为模型。微波信号的辐射频率远高于归一化信号强度，但远低于其序参数的绝对值。计算了超导带的谱函数和其中准粒子的分布函数。结果表明，当超导库的序参数绝对值趋于超导带序参数的绝对值时，弛豫对超导带相干激发态的影响明显减弱。
The effect of relaxation to a superconducting reservoir on coherent excited states of a superconductor that appear under irradiation by a microwave signal [A.V. Semenov et al., Phys. Rev. Lett. 117, 047002 (2016)] and can be destructed because of tunnel relaxation to a normal metal reservoir [A.V. Semenov et al., http://arxiv.org/abs/1801.03311] has been theoretically studied. A thin diffuse superconductor strip in tunnel contact with a diffuse superconducting reservoir is considered as a model. The strip is irradiated by a microwave signal with the frequency that is much higher than the normalized signal intensity but is much lower than the absolute value of its order parameter. The spectral functions of the superconducting strip and the distribution function of quasiparticles in it have been calculated. It has been demonstrated that the effect of relaxation on coherent excited states of the superconducting strip is significantly weakened when the absolute value of the order parameter of the superconducting reservoir tends to the absolute value of the order parameter of the superconducting strip.