Universal Heat Conduction in YBa_2Cu_3O_6.9

Дата и время публикации : 1997-06-03T19:19:16Z

Авторы публикации и институты :
Louis Taillefer (McGill University)
Benoit Lussier (McGill University)
Robert Gagnon (McGill University)
Kamran Behnia (CNRS-Orsay)
Herve Aubin (CNRS-Orsay)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: Latex file, 4 pages, 3 EPS figures, to appear in Physical Review Letters
Первичная категория: cond-mat.supr-con

Все категории : cond-mat.supr-con

Краткий обзор статьи: The thermal conductivity of YBa_2Cu_3O_6.9 was measured at low temperatures in untwinned single crystals with concentrations of Zn impurities from 0 to 3% of Cu. A linear term kappa_0/T = 0.19 mW/K^2.cm is clearly resolved as T -> 0, and found to be virtually independent of Zn concentration. The existence of this residual normal fluid strongly validates the basic theory of transport in unconventional superconductors. Moreover, the observed universal behavior is in quantitative agreement with calculations for a gap function of d-wave symmetry.

Category: Physics