Interplay of electronic and lattice degrees of freedom in A(1-x)Fe(2-y)Se(2) superconductors under pressure (Articolo in rivista)

Type
Label
  • Interplay of electronic and lattice degrees of freedom in A(1-x)Fe(2-y)Se(2) superconductors under pressure (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.88.180506 (literal)
Alternative label
  • M. Bendele, 1,2, C. Marini, 3 B. Joseph, 1,2 G. M. Pierantozzi, 1 A. S. Caporale, 1,2 A. Bianconi, 2 E. Pomjakushina, 4 K. Conder, 4 A. Krzton-Maziopa, 5,4 T. Irifune, 6 T. Shinmei, 6 S. Pascarelli, 3 P. Dore, 7 N. L. Saini, 1 and P. Postorino 8 (2013)
    Interplay of electronic and lattice degrees of freedom in A(1-x)Fe(2-y)Se(2) superconductors under pressure
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Bendele, 1,2, C. Marini, 3 B. Joseph, 1,2 G. M. Pierantozzi, 1 A. S. Caporale, 1,2 A. Bianconi, 2 E. Pomjakushina, 4 K. Conder, 4 A. Krzton-Maziopa, 5,4 T. Irifune, 6 T. Shinmei, 6 S. Pascarelli, 3 P. Dore, 7 N. L. Saini, 1 and P. Postorino 8 (literal)
Pagina inizio
  • 180506 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 88 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 18 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Dipartimento di Fisica, Universit?a di Roma \La Sapienza\", P.le Aldo Moro 2, 00185 Roma, Italy 2 Rome International Center for Materials Science Superstripes (RICMaSS), Via dei Sabelli 119A, 00185 Roma, Italy 3 European Synchrotron Radiation Facility, BP220, 38043 Grenoble Cedex, France 4 Laboratory for Developments and Methods, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland 5 Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland 6 Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan 7 CNR-SPIN and Dipartimento di Fisica, Universit?a di Roma \La Sapienza\", P.le Aldo Moro 2, 00185 Roma, Italy 8 CNR-IOM and Dipartimento di Fisica, Universit?a di Roma \La Sapienza\", P.le Aldo Moro 2, 00185 Roma, Italy (literal)
Titolo
  • Interplay of electronic and lattice degrees of freedom in A(1-x)Fe(2-y)Se(2) superconductors under pressure (literal)
Abstract
  • The local structure and electronic properties of Rb1-xFe2-ySe2 are investigated by means of site selective polarized x-ray absorption spectroscopy at the iron and selenium K-edges as a function of pressure. A combination of dispersive geometry and novel nanodiamond anvil pressure-cell has permitted to reveal a step-like decrease in the Fe-Se bond distance at p?11 GPa. The position of the Fe K-edge pre-peak, which is directly related to the position of the chemical potential, remains nearly constant until ~6 GPa, followed by an increase until p?11 GPa. Here, as in the local structure, a step-like decrease of the chemical potential is seen. Thus, the present results provide compelling evidence that the origin of the reemerging superconductivity in A1-xFe2-ySe2 in vicinity of a quantum critical transition is caused mainly by the changes in the electronic structure. (literal)
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