Temperature evolution of subharmonic gap structures in MgB2/Nb point-contacts (Articolo in rivista)

Type

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

Label

• Temperature evolution of subharmonic gap structures in MgB2/Nb point-contacts (Articolo in rivista) (literal)

Anno

• 2007-01-01T00:00:00+01:00 (literal)

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

• 10.1103/PhysRevB.72.174518 (literal)

Alternative label

• Giubileo, F; Bobba, F; Scarfato, A; Piano, S; Aprili, M; Cucolo, AM (2007)
  Temperature evolution of subharmonic gap structures in MgB2/Nb point-contacts
  in Physical review. B, Condensed matter and materials physics
  (literal)

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

• Giubileo, F; Bobba, F; Scarfato, A; Piano, S; Aprili, M; Cucolo, AM (literal)

Pagina inizio

• 587 (literal)

Pagina fine

• 588 (literal)

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

• http://prb.aps.org/pdf/PRB/v72/i17/e174518 (literal)

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

• 460 (literal)

Rivista

• Physical review. B, Condensed matter and materials physics (Rivista)

Note

• ISI Web of Science (WOS) (literal)

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

• Univ Salerno, CNR, INFM, Dipartimento Fis ER Caianiello Lab Reg SUPERMAT, I-84081 Baronissi, Italy; ESPCI, Lab Spectroscopie & Lumiere Polarisee, F-75005 Paris, France; Univ Paris 11, CNRS, CSNSM, F-91405 Orsay, France (literal)

Titolo

• Temperature evolution of subharmonic gap structures in MgB2/Nb point-contacts (literal)

Abstract

• We have performed point-contact spectroscopy experiments on superconducting micro-constrictions between Nb tips and high quality MgB2 pellets. We measured the temperature evolution (between 4.2 K and 300 K) of the current-voltage (I-V) and of the dynamical conductance (dI/dV-V) characteristics. Above the Nb critical temperature T-C(Nb), the conductance of the constrictions behaves as predicted by the BTK model for S/N contacts being Nb in its normal state below T-C(Nb), the contacts show Josephson current and subharmonic gap structures, due to multiple Andreev reflections. These observations clearly indicate the coupling of the MgB2 3D pi-band with the Nb superconducting order parameter. We found Delta(pi) = 2.4 +/- 0.2 meV for the three-dimensional gap of MgB2. (C) 2007 Elsevier B.V. All rights reserved. (literal)

Prodotto di

• Interplay tra superconduttività e magnetismo (MD.P04.014.001) (Modulo)
• Fenomeni di trasporto in materiali superconduttori (MD.P04.015.001) (Modulo)

Autore CNR

• Anna Maria Cucolo (Persona)
• FILIPPO GIUBILEO (Unità di personale interno)
• Fabrizio Bobba (Persona)

Incoming links:

Autore CNR di

• FILIPPO GIUBILEO (Unità di personale interno)
• Anna Maria Cucolo (Persona)
• Fabrizio Bobba (Persona)

Prodotto

• Fenomeni di trasporto in materiali superconduttori (MD.P04.015.001) (Modulo)
• Interplay tra superconduttività e magnetismo (MD.P04.014.001) (Modulo)

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

• Physical review. B, Condensed matter and materials physics (Rivista)