Microwave spectroscopy of thermally excited quasiparticles in YBa2Cu3O6.99

Article

关键词: QUASI-PARTICLE SCATTERING;    D-WAVE SUPERCONDUCTORS;    PENETRATION DEPTH;    SURFACE IMPEDANCE;    SINGLE-CRYSTALS;    TEMPERATURE-DEPENDENCE;    UNCONVENTIONAL SUPERCONDUCTORS;    RAPID SUPPRESSION;    COHERENCE PEAK;    THIN-FILMS;   

DOI  :  10.1103/PhysRevB.60.1349

来源: SCIE

【 摘 要 】

We present here the microwave surface impedance of a high-purity crystal of YBa2Cu3O6.99 measured at five frequencies between 1 and 75 GHz. This data set reveals the main features of the conductivity spectrum of the thermally excited quasiparticles in the superconducting state. Below 20 K there is a regime of extremely long quasiparticle scattering times, due to both the collapse of inelastic scattering below T-c and the very weak impurity scattering in the high-purity BaZrO3-grown crystal used in this study. Above 20 K, the scattering increases dramatically, initially at least as fast as T-4. [S0163-1829(99)04425-2].

【 授权许可】

Free