Location of the minimum of the differential tunneling resistance R(V) in a superconductor-degenerate semiconductor Schottky contact (Articolo in rivista)

Type
Label
  • Location of the minimum of the differential tunneling resistance R(V) in a superconductor-degenerate semiconductor Schottky contact (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1140/epjb/e2003-00103-x (literal)
Alternative label
  • Lissitski M.P., Naddeo A., Nappi C., Tagliacozzo A., Gubankov V.N., Monaco R., Russo M. (2003)
    Location of the minimum of the differential tunneling resistance R(V) in a superconductor-degenerate semiconductor Schottky contact
    in The European physical journal. B, Condensed matter physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lissitski M.P., Naddeo A., Nappi C., Tagliacozzo A., Gubankov V.N., Monaco R., Russo M. (literal)
Pagina inizio
  • 309 (literal)
Pagina fine
  • 314 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 32 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Lissitski, MP (Reprint Author), Consiglio Nazl Ric E Caianiello, Ist Cibernet, Pozzuoli, Naples, Italy. Consiglio Nazl Ric E Caianiello, Ist Cibernet, Pozzuoli, Naples, Italy. Univ Naples Federico II, Dipartimento Sci Fis, INFM, Naples, Italy. Russian Acad Sci, Inst Radio Engn \& Elect, Moscow 103907, Russia. Univ Salerno, Dipartimento Sci Fis, INFM, I-84100 Salerno, Italy. (literal)
Titolo
  • Location of the minimum of the differential tunneling resistance R(V) in a superconductor-degenerate semiconductor Schottky contact (literal)
Abstract
  • Measurements of differential resistance in a superconductor-degenerate semiconductor junction Nb-n++GaAs at T=1.6K show close similarity to those for a conventional superconductor-insulator-normal metal junction, except for the position of the minimum which is located at 3.6 meV. Using a simple model for the charge screening at the Schottky barrier, we give an argument why this minimum is by far displaced with respect to the superconducting gap energy (delta=1.5meV for bulk Nb). We argue that a rebuilding of the density of states takes place at the barrier, due to the imperfect metal screening in the degenerate semiconductor. Energy states close to the degenerate semiconductor Fermi energy are depleted at the barrier and are not available for tunneling, up to an energy Eg which adds to the superconducting gap. (literal)
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