Fluctuations in superconductors belowT
c |
| |
Authors: | Hartwig Schmidt |
| |
Institution: | 1. Physik-Department der Technischen Hochschule München, Deutschland
|
| |
Abstract: | Thermal fluctuations of the order parameter in the superconducting state are investigated, particularly near the transition temperature, using the time dependent Ginzburg-Landau theory. These fluctuations give rise to a contribution of the dynamical conductivity, which strongly increases as the temperature is raised towardsT c , in contrast to the temperature dependence of the electromagnetic response due to the static order parameter. At the transition temperature this contribution joins continuously to the extra response (conductivity, susceptibility) which has been calculated and observed in the temperature region aboveT c , where it represents the onset of superconductivity in the normal state. Particularly the dynamical conductivity due to fluctuations is calculated and discussed for bulk material, thin films and thin wires belowT c . The temperature and frequency dependence should be observable in microwave experiments. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|