ANOMALOUS BEHAVIOR OF THE COMPLEX CONDUCTIVITY OF Y1-XPRXBA2CU3O7 OBSERVED WITH THZ SPECTROSCOPY

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关键词: QUASI-PARTICLE SCATTERING;    STATE;    YBA2CU3O7-DELTA;    PRBA2CU3O7;    GAP;    SUPERCONDUCTIVITY;    YBA2CU3O6.95;    SUPPRESSION;    DEPENDENCE;    TRANSPORT;   

DOI  :  10.1103/PhysRevB.50.9672

来源: SCIE

【 摘 要 】

We have measured the complex conductivity of Y1-xPrxBa2Cu3O7 single-crystal thin films using coherent THz spectroscopy. We obtain directly the London penetration depth, the plasma frequency omega(p), and the quasiparticle scattering rate 1/tau. We find that 1/tau drops rapidly with temperature below T(c) in all the superconducting samples, implying that this is a signature of high-T(c) superconductivity. omega(p) decreases with increasing chi, indicating that Pr takes mobile carriers from the CuO planes. Both the THz and dc conductivity yield evidence for the opening of a spin gap above T(c).

【 授权许可】

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