Effect of disorder in MgB2 thin films (Articolo in rivista)

Type
Label
  • Effect of disorder in MgB2 thin films (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.71.214502 (literal)
Alternative label
  • Kim, H. J. (4); Di Capua, R. (3); Vaglio, R. (3); Chiarella, F. (3); Lee, S. I. (4); Iavarone, M. (2); Koshelev, A. E. (2); Kwok, W. K. (2); Xi, X. X. (1); Pogrebnyakov, A. V. (1); Redwing, J. M. (1); Kang, W. N. (4); Choi, E. M. (4) (2005)
    Effect of disorder in MgB2 thin films
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Kim, H. J. (4); Di Capua, R. (3); Vaglio, R. (3); Chiarella, F. (3); Lee, S. I. (4); Iavarone, M. (2); Koshelev, A. E. (2); Kwok, W. K. (2); Xi, X. X. (1); Pogrebnyakov, A. V. (1); Redwing, J. M. (1); Kang, W. N. (4); Choi, E. M. (4) (literal)
Pagina inizio
  • 214502-1 (literal)
Pagina fine
  • 214502-7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 71 (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
  • (1) Department of Materials Science and Engineering - Pennsylvania State University; (2) Materials Science Division - Argonne National Laboratory; (3) INFM-Coherentia Dipartimento di Scienze Fisiche - Facoltà di Ingegneria; (4) NCRICS and Department of Physics - Pohang University of Science and Technology (literal)
Titolo
  • Effect of disorder in MgB2 thin films (literal)
Abstract
  • We report on scanning tunneling spectroscopy studies of magnesium diboride (MgB2) thin films grown by different techniques. The films have critical temperatures ranging between 28 and 41 K with very different upper critical fields. We find that the superconducting gap associated with the ? band decreases almost linearly with decreasing critical temperature while the gap associated with the ? band is only very weakly affected in the range of critical temperatures above 30 K. In the sample with the lowest critical temperature (28 K) we observe a small increase of the ? gap that can only be explained in terms of an increase in the interband scattering. The tunneling data was analyzed in the framework of the two-band model. The magnetic-field-dependent tunneling spectra and the upper critical field measurements of these disordered samples can be consistently explained in terms of an increase of disorder that mostly affects the ? band in samples with reduced critical temperatures. © 2005 The American Physical Society. (literal)
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