Parity-Affected Superconductivity in Ultrasmall Metallic Grains

Дата и время публикации : 1996-04-11T17:12:29Z

Авторы публикации и институты :
Jan von Delft
Dmitrii S. Golubev
Wolfgang Tichy
Andrei D. Zaikin

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 4 pages RevTeX, 1 encapsulated postscript figure, submitted to Physical Review Letters
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We investigate the breakdown of BCS superconductivity in {em ultra}/small metallic grains as a function of particle size (characterized by the mean spacing $d$ between discrete electronic eigenstates), and the parity ($P$ = even/odd) of the number of electrons on the island. Assuming equally spaced levels, we solve the parity-dependent BCS gap equation for the order parameter $Delta_P (d,T)$. Both the $T=0$ critical level spacing $d_{c,P} $ and the critical temperature $T_{c,P} (d)$ at which $Delta_P = 0$ are parity dependent, and both are so much smaller in the odd than the even case that these differences should be measurable in current experiments.

Category: Physics