Isotope and interband effects in a multi-band model of superconductivity

Bussmann Holder, A.; Keller, H.; Khasanov, R.; Simon, A.; Bianconi, Antonio; Bishop, A. R.

doi:10.1088/1367-2630/13/9/093

Isotope effects (IEs) are essential in determining the pairing mechanism in superconductors. Whereas for Bardeen–Cooper–Schrieffer (BCS)-type superconductors, a clear consensus about IE exists, this is unknown in multiband superconductors (MBSs). We demonstrate here that for MBSs the IEs on the superconducting transition temperature can vary between the BCS value and zero as long as the intraband couplings are affected. It can, however, exceed the BCS value when interband effects are dominant. In both cases, a sign reversal is excluded. In addition, we show that interband coupling contributes substantially to enhancement of T c . The results are independent of the pairing symmetry and the system-specific band structure. Specifically, we do not address the IEs originating from the MBSs with respect to a specific superconductor, but rather study its emergence within this model and explore all possible sources within the weak coupling theory.

Isotope and interband effects in a multi-band model of superconductivity / A., Bussmann Holder; H., Keller; R., Khasanov; A., Simon; Bianconi, Antonio; A. R., Bishop. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - STAMPA. - 13(2011), pp. 093009-1-093009-8. [10.1088/1367-2630/13/9/093]

Scheda prodotto non validato

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Titolo:	Isotope and interband effects in a multi-band model of superconductivity
Autori:	A. Bussmann Holder H. Keller R. Khasanov A. Simon BIANCONI, Antonio A. R. Bishop mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2011
Rivista:	NEW JOURNAL OF PHYSICS
Citazione:	Isotope and interband effects in a multi-band model of superconductivity / A., Bussmann Holder; H., Keller; R., Khasanov; A., Simon; Bianconi, Antonio; A. R., Bishop. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - STAMPA. - 13(2011), pp. 093009-1-093009-8. [10.1088/1367-2630/13/9/093]
Handle:	http://hdl.handle.net/11573/416027
Appartiene alla tipologia:	01a Articolo in rivista

File allegati a questo prodotto

Non ci sono file associati a questo prodotto.

Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/11573/416027

Citazioni

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Catalogo dei prodotti della ricerca

Scheda prodotto non validato

File allegati a questo prodotto