An extended infrared study of the p, T phase diagram of the p-doped Cu-O plane (Articolo in rivista)

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Label
  • An extended infrared study of the p, T phase diagram of the p-doped Cu-O plane (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/1367-2630/13/12/123009 (literal)
Alternative label
  • Nicoletti, D.; Di Pietro, P.; Limaj, O.; Calvani, P.; Schade, U.; Ono, S.; Ando, Yoichi; Lupi, S. (2011)
    An extended infrared study of the p, T phase diagram of the p-doped Cu-O plane
    in New journal of physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Nicoletti, D.; Di Pietro, P.; Limaj, O.; Calvani, P.; Schade, U.; Ono, S.; Ando, Yoichi; Lupi, S. (literal)
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  • 13 (literal)
Rivista
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  • 26 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Sapienza University Rome; Sapienza University Rome; Sapienza University Rome; Berliner Elektronenspeicherring Gesell Synchrotro; Central Research Institute of Electric Power Industry - Japan; Osaka University (literal)
Titolo
  • An extended infrared study of the p, T phase diagram of the p-doped Cu-O plane (literal)
Abstract
  • The ab-plane optical conductivity of 11 single crystals, belonging to the families Sr(2-x)CuO(2)Cl(2), Y(1-x)Ca(x)Ba(2)Cu(3)O(6), Bi(2)Sr(2-x)La(x)CuO(6) and Bi(2)Sr(2)CaCu(2)O(8), has been measured with hole concentrations p between 0 and 0.18 and for 6 K <= T <= 500 K to obtain an infrared picture of the p, T phase diagram of the Cu-O plane. At extreme dilution (p = 0.005), a narrow peak is observed at 1570 cm(-1) (195 meV), which we assign to a single-hole bound state. For increasing doping, that peak broadens into a far-infrared (FIR) band whose low-energy edge sets the insulating gap. The insulator-to-metal transition (IMT) occurs when the softening of the FIR band closes the gap, thus evolving into a Drude term. In the metallic phase, a multi-band analysis identifies a mid-infrared band which weakly depends on temperature and softens for increasing p, while the extended-Drude analysis leads to an optical scattering rate larger than the frequency, as was found in other cuprates. The infrared spectral weight W(T) is consistent with a Fermi liquid renormalized by strong correlations, provided that the T(4) term of the Sommerfeld expansion is included above 300 K. In the superconducting phase, the optical response of single-layer Bi(2)Sr(2-x)La(x)CuO(6) at optimum doping is similar to that of the corresponding optimally doped bilayer Bi(2)Sr(2)CaCu(2)O(8). (literal)
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