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

doi:10.1103/PhysRevLett.90.237005

Observation of weak-limit quasiparticle scattering via broadband microwave spectroscopy of a d-wave superconductor

Phys Rev Lett. 2003 Jun 13;90(23):237005. doi: 10.1103/PhysRevLett.90.237005. Epub 2003 Jun 13.

Authors

P J Turner¹, 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

Affiliation

¹ Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1.

PMID: 12857284
DOI: 10.1103/PhysRevLett.90.237005

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.