Impurity Scattering and Gap Structure in the Anisotropic Superconductor UPt$_3$

Дата и время публикации : 1995-04-19T22:00:47Z

Авторы публикации и институты :
Benoit Lussier
Brett Ellman
Louis Taillefer

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 12 pages revtex
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: The thermal conductivity, $kappa$, of the heavy fermion superconductor UPt$_3$ was measured down to T$_c$/10. The absence of a linear term in the temperature dependence as T$rightarrow$0 strongly suggests there are no zero energy quasiparticle excitations, in contradiction with the gapless behaviour often inferred from specific heat. A non-vanishing anisotropy ratio $kappa_c$/$kappa_b$ as T$rightarrow$0 establishes a new property of the gap structure: the presence of nodes along the c-axis. Furthermore, recent calculations by Fledderjohann and Hirschfeld show these cannot be point nodes with a linear k-dependence.

Category: Physics