Evidence for gap anisotropy in CaC6 from directional point-contact spectroscopy (Articolo in rivista)

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  • Evidence for gap anisotropy in CaC6 from directional point-contact spectroscopy (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.100.207004 (literal)
Alternative label
  • Gonnelli, RS; Daghero, D; Delaude, D; Tortello, M; Ummarino, GA; Stepanov, VA; Kim, JS; Kremer, RK; Sanna, A; Profeta, G; Massidda, S (2008)
    Evidence for gap anisotropy in CaC6 from directional point-contact spectroscopy
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gonnelli, RS; Daghero, D; Delaude, D; Tortello, M; Ummarino, GA; Stepanov, VA; Kim, JS; Kremer, RK; Sanna, A; Profeta, G; Massidda, S (literal)
Pagina inizio
  • 207004 (literal)
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  • http://prl.aps.org/abstract/PRL/v100/i20/e207004 (literal)
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  • 100 (literal)
Rivista
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  • 20 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Gonnelli, R. S.; Daghero, D.; Delaude, D.; Tortello, M.; Ummarino, G. A.] Politecn Torino, Dipartimento Fis, I-10129 Turin, Italy; [Gonnelli, R. S.; Daghero, D.; Delaude, D.; Tortello, M.; Ummarino, G. A.] Politecn Torino, CNISM, I-10129 Turin, Italy; [Stepanov, V. A.] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia; [Kim, J. S.; Kremer, R. K.] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany; [Sanna, A.] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany; [Profeta, G.] Univ Aquila, Dipartimento Fis, CNISM, I-67100 Laquila, Italy; [Sanna, A.; Massidda, S.] Univ Cagliari, Dipartimento Fis, I-09124 Cagliari, Italy; [Sanna, A.; Massidda, S.] CNR, INFM, SLACS, I-00185 Rome, Italy (literal)
Titolo
  • Evidence for gap anisotropy in CaC6 from directional point-contact spectroscopy (literal)
Abstract
  • We present the first results of directional point-contact spectroscopy in high-quality CaC6 samples both along the ab plane and in the c-axis direction. The superconducting order parameter Delta(0), obtained by fitting the Andreev-reflection (AR) conductance curves at temperatures down to 400 mK with the single-band 3D Blonder-Tinkham-Klapwijk model, presents two different distributions in the two directions of the main current injection, peaked at 1.35 and 1.71 meV, respectively. By ab initio calculations of the AR conductance spectra, we show that the experimental results are in good agreement with the recent predictions of gap anisotropy in CaC6. (literal)
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