2. delta. /sub 0//(k/sub B/T/sub c/) and the parameters of the phonon spectrum for amorphous superconductors
Journal Article
·
· Chin. Phys.; (United States)
OSTI ID:6980276
In this paper, we propose a formula which can describe well the relations between 2..delta../sub 0//(k/sub B/T/sub c/) and the parameters of the phonon spectrum of disordered and amorphous superconductors for the nontransition metals and their alloys. Here T/sub 0/ = 0.66K, A = 1/5 K/sup 1//sup ///sup 2/, lambda is electron-phonon coupling constant, <..omega..> is the average phonon frequency, and ..omega../sub 0/ the high frequency cutoff of the effective phonon spectrum ..cap alpha../sup 2/F(..omega..). The values of 2..delta../sub 0//(k/sub B/T/sub c/) of disordered and amorphous superconductors which have the known parameters of the phonon spectrum have been calculated. Agreement with experiment is within a few percent. We show that the amorphous superconductor of nontransition metals and alloys is either a strong-coupling superconductor which has a 2..delta../sup 0//(k/sub B/T/sub c/) value much larger than the BCS theory value, or a weak-coupling superconductor which has a considerably smaller one than the BCS theory value.
- Research Organization:
- Institute of Plasma Physics, Academia, Sinica, Hefei
- OSTI ID:
- 6980276
- Journal Information:
- Chin. Phys.; (United States), Journal Name: Chin. Phys.; (United States) Vol. 6:4; ISSN CHPHD
- Country of Publication:
- United States
- Language:
- English
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