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APS » Journals » Phys. Rev. Lett. » Volume 90 » Issue 23
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Phys. Rev. Lett. 90, 237005 (2003) [4 pages]

Observation of Weak-Limit Quasiparticle Scattering via Broadband Microwave Spectroscopy of a d-Wave Superconductor

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

Received 31 July 2002; published 13 June 2003

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 dx2-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.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.237005
DOI:
10.1103/PhysRevLett.90.237005
PACS:
74.25.Nf, 74.72.Bk

*Permanent address: Department of Physics, Simon Fraser University, Burnaby, B.C., Canada, V5A 1S6.

†Permanent address: Department of Physics and Astronomy, McMaster University, Hamilton, ON, Canada, L8S 4M1.

 
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