论文标题
II型超导体在弱钉处的微波响应
Microwave response of type-II superconductors at weak pinning
论文作者
论文摘要
考虑到系统参数的随机空间波动（例如阶参数，扩散系数或薄膜厚度）的随机空间波动，在混合状态下，II型超导体的薄膜的线性微波反应理论被开发出来。在集体固定的制度中，系统的微波反应表现出强频分散，这是由非平衡涡流核心准粒子引起的。对交流电导率的相应贡献由非弹性松弛时间控制，并且可能超过通常的Bardeen-Stephen电导率。它是由Debye型非弹性放松引起的。微波损失的DEBYE机制可能是导致电磁噪声在低温下混合状态下电磁噪声的强大作用。
Theory of linear microwave response of thin films of type-II superconductors in the mixed state is developed taking into account random spatial fluctuations of the parameters of the system, such as the order parameter, diffusion coefficient, or film thickness. In the regime of collective pinning the microwave response of the system exhibits strong frequency dispersion, arising from nonequilibrium vortex core quasiparticles. The corresponding contribution to the ac conductivity is controlled by the inelastic relaxation time, and may exceed the usual Bardeen-Stephen conductivity. It is caused by the Debye-type inelastic relaxation. Debye mechanism of microwave losses may be responsible for strong effects of electromagnetic noise upon dc conductivity in the mixed state at low temperatures.
