Direct observation of the quasiparticle relaxation in YBa2Cu3O7-delta

Citation
A. Pimenov et al., Direct observation of the quasiparticle relaxation in YBa2Cu3O7-delta, PHYSICA B, 261, 1999, pp. 524-525
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
261
Year of publication
1999
Pages
524 - 525
Database
ISI
SICI code
0921-4526(199901)261:<524:DOOTQR>2.0.ZU;2-9
Abstract
The real and imaginary parts of the optical conductivity (delta(1) + i delt a(2)) in the superconducting state of YBa2Cu3O7 (- delta) thin films have b een obtained by submillimeter spectroscopy for frequencies from 3 to 35 cm( -1). The quasiparticle relaxation can be directly observed in this frequenc y range. A Drude-type analysis allows to extract the temperature dependence of the scattering rate; The collapse of the relaxation rates provides clea r experimental evidence that the spin fluctuations become gapped below T-C. (C) 1999 Elsevier Science B.V. All rights reserved.