The Amplification of the Superconducting Tc by Combined Effect of Tuning of the Fermi Level and the Tensile Micro-Strain in Al1-xmgxb2 (Articolo in rivista)

Type
Label
  • The Amplification of the Superconducting Tc by Combined Effect of Tuning of the Fermi Level and the Tensile Micro-Strain in Al1-xmgxb2 (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1209/epl/i2002-00634-2 (literal)
Alternative label
  • Di Castro D., Agrestini S., Campi G., Cassetta A., Colapietro M., Congeduti A., Continenza A., De Negri S., Giovannini M., Massidda S., Nardone M., Pifferi A., Postorino P., Profeta G., Saccone A., Saini N.L., Satta G., Bianconi A. (2002)
    The Amplification of the Superconducting Tc by Combined Effect of Tuning of the Fermi Level and the Tensile Micro-Strain in Al1-xmgxb2
    in Europhysics letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Di Castro D., Agrestini S., Campi G., Cassetta A., Colapietro M., Congeduti A., Continenza A., De Negri S., Giovannini M., Massidda S., Nardone M., Pifferi A., Postorino P., Profeta G., Saccone A., Saini N.L., Satta G., Bianconi A. (literal)
Pagina inizio
  • 278 (literal)
Pagina fine
  • 284 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 58 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Fisica, Unit√† INFM, Universit√† di Roma La Sapienza, P. le Aldo Moro 2, 00185 Roma, Italy Istituto di Strutturistica Chimica del CNR, Area Ricerca di Roma Montelibretti, 00016 Monterotondo Stazione, Italy Dipartimento di Chimica, Universit√† di Roma La Sapienza, P. le Aldo Moro 2, 00185 Roma, Italy (literal)
Titolo
  • The Amplification of the Superconducting Tc by Combined Effect of Tuning of the Fermi Level and the Tensile Micro-Strain in Al1-xmgxb2 (literal)
Abstract
  • The increase of Tc with x in Al1-xMgxB2 is controlled by the Fermi level tuning at a \"shape resonance\" (i.e., the 2D-3D cross-over, at x = 0.66, of the topology of the Fermi surface of ? holes in the superlattice of boron mono-layers intercalated by Al1-xMgx ions) and by the tensile \"micro-strain\" in the boron sub-lattice (due to the lattice misfit between the boron and the intercalated layers). The softening of the E2g phonon frequency with increasing boron tensile micro-strain ? in the range 3% < ? < 6% shows the increasing electron-lattice interaction. The linear scaling, for 0.66 < x < 1, of Tc vs. the Fermi temperature TF of the ? holes shows a constant coupling strength with kF?0 = 90 (where kF is the Fermi wave vector and ?o is the Pippard coherence length) that points toward a vibronic pairing mechanism. (literal)
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