Two-gap state density in MgB2: A true bulk property or a proximity effect? (Articolo in rivista)

Type
Label
  • Two-gap state density in MgB2: A true bulk property or a proximity effect? (Articolo in rivista) (literal)
Anno
  • 2001-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.87.177008 (literal)
Alternative label
  • Giubileo, F; Roditchev, D; Sacks, W; Lamy, R; Thanh, DX; Klein, J; Miraglia, S; Fruchart, D; Marcus, J; Monod, P (2001)
    Two-gap state density in MgB2: A true bulk property or a proximity effect?
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Giubileo, F; Roditchev, D; Sacks, W; Lamy, R; Thanh, DX; Klein, J; Miraglia, S; Fruchart, D; Marcus, J; Monod, P (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 87 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 17 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • University of Salerno; Consiglio Nazionale delle Ricerche (CNR); PRES University Sorbonne Paris Cite; Centre National de la Recherche Scientifique (CNRS); Inst Mat Sci Agh; Centre National de la Recherche Scientifique (CNRS); Centre National de la Recherche Scientifique (CNRS); Centre National de la Recherche Scientifique (CNRS) (literal)
Titolo
  • Two-gap state density in MgB2: A true bulk property or a proximity effect? (literal)
Abstract
  • We report on the temperature dependence of the quasiparticle density of states in the simple binary compound MgB2 directly measured using scanning tunneling microscope (STM). To achieve high quality tunneling conditions. a small crystal of MgB2 is used as a tip in the STM experiment. The \"sample\" is chosen to be a 2H-NbSe2 single crystal presenting an atomically flat surface. At low temperature the tunneling conductance spectra show a gap at the Fermi energy followed by two well-pronounced conductance peaks on each side. They appear at voltages V-S similar or equal to 3.8 mV and V-L similar or equal to +/- 7.8 mV. With rising temperature both peaks disappear at the T-C of the bulk MgB2, a behavior consistent with the model of two-gap superconductivity. The possibility of a particular proximity effect is also discussed. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it