Order Parameter "Holes" and Theory of Microwave Conductivity in YBCO

Abstract

We propose that the low temperature discrepancy between simple d-wave models of the microwave conductivity and existing experiments on single crystals of YBCO can be resolved by including the scattering of quasiparticles from "holes" of the order parameter at impurity sites. Within a framework proposed previously, we find in particular excellent agreement with data of Hosseini et al. on slightly overdoped YBCO samples over the entire temperature range down to about 2-3K, and for a wide range of frequencies. Remaining discrepancies in the "universal" regime at very low temperatures are discussed.

5 pages, 3 PS figures

References in corpus (2)

• Quasiparticles in the superconducting state of Bi2Sr2CaCu2O8
• Resonant states and order-parameter suppression near point-like impurities in d-wave superconductors

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• Phenomenological description of the microwave surface impedance and complex conductivity of high-$T_c$ single crystals
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• Quantum Interference Phenomena Between Impurity States in d-wave Superconductors
• Nature of c-axis coupling in underdoped Bi2Sr2CaCu2O8 with varying degrees of disorder
• Microwave conductivity due to impurity scattering in cuprate superconductors