Infrared properties of Mg1-xAlx(B1-yCy)(2) single crystals in the normal and superconducting state (Articolo in rivista)

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  • Infrared properties of Mg1-xAlx(B1-yCy)(2) single crystals in the normal and superconducting state (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.73.174509 (literal)
Alternative label
  • D. Di Castro (1); M. Ortolani (2); E. Cappelluti (3); U. Schade (4); N.D. Zhigadlo (5); J. Karpinski (5) (2006)
    Infrared properties of Mg1-xAlx(B1-yCy)(2) single crystals in the normal and superconducting state
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D. Di Castro (1); M. Ortolani (2); E. Cappelluti (3); U. Schade (4); N.D. Zhigadlo (5); J. Karpinski (5) (literal)
Pagina inizio
  • 174509-1 (literal)
Pagina fine
  • 174509-12 (literal)
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  • http://prb.aps.org/abstract/PRB/v73/i17/e174509 (literal)
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  • 73 (literal)
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  • 12 (literal)
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  • 17 (literal)
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  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
  • Google Scholar (literal)
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  • (1) \"Coherentia\" CNR-INFM and Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy (2) \"Coherentia\" CNR-INFM and Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma and Berliner Elektronenspeicherring Gesellschaft für Synchrotronstrahlung m.b.H (BESSY), Albert-Einstein-Strasse 15, D-12489 Berlin, Germany (3) SMC, \"Istituto dei Sistemi Complessi,\" CNR-INFM, v. dei Taurini 19, 00185 Roma, Italy and Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy (4) Berliner Elektronenspeicherring Gesellschaft für Synchtrotronstrahlung m.b.H (BESSY), Albert-Einstein-Strasse 15, D-12489, Germany (5) Solid State Physics Laboratory, ETH, CH-8093 Zürich, Switzerland (literal)
Titolo
  • Infrared properties of Mg1-xAlx(B1-yCy)(2) single crystals in the normal and superconducting state (literal)
Abstract
  • The reflectivity R(omega) of ab-oriented Mg1-xAlx(B1-yCy)(2) single crystals has been measured by means of infrared microspectroscopy for 1300 sigma interband excitation, predicted by theory, is observed at omega(IB)similar or equal to 0.47 eV in the undoped sample, and shifts to lower energies with doping. By performing theoretical calculation of the doping dependence omega(IB), the experimental observations can be explained with the increase with electron doping of the Fermi energy of the holes in the sigma band. On the other hand, the sigma band density of states seems not to change substantially, suggesting that a relevant role, for what regards the reduction of T-c, can be played also by the disorder, at least for the doping level studied here. The superconducting state has been also probed by infrared synchrotron radiation for 30
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