Anomalous isotope effect near a 2.5 Lifshitz transition in a multi-band multi-condensate superconductor made of a superlattice of stripes (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Anomalous isotope effect near a 2.5 Lifshitz transition in a multi-band multi-condensate superconductor made of a superlattice of stripes (Articolo in rivista) (literal)

Anno

• 2012-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1088/0953-2048/25/12/124002 (literal)

Alternative label

• Perali, Andrea; Innocenti, Davide; Valletta, Antonio; Bianconi, Antonio (2012)
  Anomalous isotope effect near a 2.5 Lifshitz transition in a multi-band multi-condensate superconductor made of a superlattice of stripes
  in Superconductor science and technology (Print)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Perali, Andrea; Innocenti, Davide; Valletta, Antonio; Bianconi, Antonio (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 25 (literal)

Rivista

• Superconductor science and technology (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 7 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 12 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• University of Camerino; Mediterranean Inst Fundamental Phys; University of Rome Tor Vergata; University of Rome Tor Vergata; Consiglio Nazionale delle Ricerche (CNR); Rome Int Ctr Mat Sci Superstripes RICMASS (literal)

Titolo

• Anomalous isotope effect near a 2.5 Lifshitz transition in a multi-band multi-condensate superconductor made of a superlattice of stripes (literal)

Abstract

• The doping dependent isotope effect on the critical temperature. (T-c) is calculated for multi-band multi-condensate superconductivity near a 2.5 Lifshitz transition. We consider a superlattice of quantum stripes with finite hopping between stripes near a 2.5 Lifshitz transition for the appearance of a new sub-band making a circular electron-like Fermi surface pocket. We describe a particular type of BEC (Bose-Einstein Condensate) to BCS (Bardeen-Cooper-Schrieffer condensate) crossover in multi-band/multi-condensate superconductivity at a metal-to-metal transition that is quite different from the standard BEC-BCS crossover at an insulator-to-metal transition. The results show that the isotope coefficient strongly deviates from the standard BCS value 0.5, when the chemical potential is tuned at the 2.5 Lifshitz transition for the metal-to-metal transition. The critical temperature T-c shows a minimum due to the Fano antiresonance in the superconducting gaps and the isotope coefficient diverges at the point where a BEC coexists with a BCS condensate. In contrast T-c reaches its maximum and the isotope coefficient vanishes at the crossover from a polaronic condensate to a BCS condensate in the newly appearing sub-band. (literal)

Prodotto di

• Institute for microelectronics and microsystems (IMM) (Istituto)
• Analisi e modellizzazione di nanodispositivi quantistici e di sistemi complessi (MD.P02.023.002) (Modulo)

Autore CNR

• ANTONIO VALLETTA (Unità di personale interno)

Incoming links:

Prodotto

• Institute for microelectronics and microsystems (IMM) (Istituto)
• Analisi e modellizzazione di nanodispositivi quantistici e di sistemi complessi (MD.P02.023.002) (Modulo)

Autore CNR di

• ANTONIO VALLETTA (Unità di personale interno)
• http://www.cnr.it/ontology/cnr/individuo/unitaDiPersonaleEsterno/ID23282

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Superconductor science and technology (Rivista)