A non-local extension of the Gaspari-Gyorffy theory for superconductors

Autor:	H. Rietschel
Rok vydání:	1978
Předmět:	Superconductivity Pseudopotential Physics Free electron model Condensed Matter::Materials Science Muffin-tin approximation Simple (abstract algebra) Quantum mechanics Extension (predicate logic) Condensed Matter Physics Non local Electronic Optical and Magnetic Materials
Zdroj:	Zeitschrift f�r Physik B Condensed Matter and Quanta. 30:271-275
ISSN:	1434-6036 0340-224X
DOI:	10.1007/bf01320032
Popis:	We present a theory which extends the Gaspari-Gyorffy theory to include non-local corrections within the framework of the spherical rigid muffin tin approximation. We thereby construct an on-Fermi-sphere pseudopotential similar to that of the simple free electron metals. We apply our theory to Al and NbC for whichα 2(ω) andT c are calculated. It turns out that for NbC the local approximation works well whereas for Al non-local corrections are important.
Databáze:	OpenAIRE
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