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25 April 2024

» pubmed » pmid12857284

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Observation of weak-limit quasiparticle scattering via broadband microwave spectroscopy of a d-wave superconductor
P J Turner ; R Harris ; Saeid Kamal ; M E Hayden ; D M Broun ; D C Morgan ; A Hosseini ; P Dosanjh ; G K Mullins ; J S Preston ; Ruixing Liang ; D A Bonn ; W N Hardy ;
Date:	13 Jun 2003
Journal:	Phys Rev Lett, 90 (23), 237005
Abstract:	There has long been a discrepancy between microwave conductivity measurements in high temperature superconductors and the conductivity spectrum expected in the simplest models for impurity scattering in a d-wave superconductor. Here we present a new type of broadband measurement of microwave surface resistance that finally shows some of the spectral features expected for a d(x2-y2) pairing state. Cusp-shaped conductivity spectra, consistent with weak impurity scattering of nodal quasiparticles, were obtained in the 0.6-21 GHz frequency range in highly ordered crystals of YBa2Cu3O6.50 and YBa2Cu3O6.99.
Source:	PubMed, pmid12857284
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