Local Pairing at U-impurities in BCS Superconductors

Дата и время публикации : 1997-04-24T20:12:21Z

Авторы публикации и институты :
Ivar Martin (University of Illinois at Urbana-Champaign)
Philip Phillips (University of Illinois at Urbana-Champaign)

Ссылка на журнал-издание: Phys. Rev. B, v.56, 14650 (1997)
Коментарии к cтатье: 4 pages, LaTeX, 2 figures
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el, cond-mat.supr-con

Краткий обзор статьи: We analyse here the role electrons on Anderson-U impurities play in superconductivity in a metal alloy. We find that phonon coupling at impurities counteracts the traditional effects which dominate T_c suppression in the non-magnetic limit. In some cases, we findt hat non-magnetic impurities can enhance T_c. In the Kondo limit, a Fermi liquid analysis reveals that it is the enhancement in the density of states arising from the Kondo resonancethat counteracts pair-weakening.

Category: Physics