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Electronic screening-enhanced hole pairing in two-leg spin ladders studied by high-resolution resonant inelastic x-ray scattering at Cu M edges.
Rusydi, A; Goos, A; Binder, S; Eich, A; Botril, K; Abbamonte, P; Yu, X; Breese, M B H; Eisaki, H; Fujimaki, Y; Uchida, S; Guerassimova, N; Treusch, R; Feldhaus, J; Reininger, R; Klein, M V; Rübhausen, M.
Afiliación
  • Rusydi A; Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany and Center for Free Electron Laser Science (CFEL), Notkestraße 85, D-22607 Hamburg, Germany and NUSSNI-NanoCore, Department of Physics, National University of Singapore, Singapore 117542, Singapore and Si
  • Goos A; Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany and Center for Free Electron Laser Science (CFEL), Notkestraße 85, D-22607 Hamburg, Germany.
  • Binder S; Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany and Center for Free Electron Laser Science (CFEL), Notkestraße 85, D-22607 Hamburg, Germany.
  • Eich A; Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany and Center for Free Electron Laser Science (CFEL), Notkestraße 85, D-22607 Hamburg, Germany.
  • Botril K; Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany and Center for Free Electron Laser Science (CFEL), Notkestraße 85, D-22607 Hamburg, Germany.
  • Abbamonte P; Physics Department and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.
  • Yu X; Singapore Synchrotron Light Source, National University of Singapore, Singapore 117603, Singapore.
  • Breese MB; NUSSNI-NanoCore, Department of Physics, National University of Singapore, Singapore 117542, Singapore and Singapore Synchrotron Light Source, National University of Singapore, Singapore 117603, Singapore.
  • Eisaki H; Nanoelectronics Research Institute, AIST, 1-1-1 Central 2, Umezono, Tsukuba, Ibaraki 305-8568, Japan.
  • Fujimaki Y; Department of Superconductivity, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan.
  • Uchida S; Department of Superconductivity, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan.
  • Guerassimova N; Photon Science, DESY, Notkestraße 85, D-22607 Hamburg, Germany.
  • Treusch R; Photon Science, DESY, Notkestraße 85, D-22607 Hamburg, Germany.
  • Feldhaus J; Photon Science, DESY, Notkestraße 85, D-22607 Hamburg, Germany.
  • Reininger R; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Klein MV; Physics Department and Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.
  • Rübhausen M; Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany and Center for Free Electron Laser Science (CFEL), Notkestraße 85, D-22607 Hamburg, Germany and NUSSNI-NanoCore, Department of Physics, National University of Singapore, Singapore 117542, Singapore.
Phys Rev Lett ; 113(6): 067001, 2014 Aug 08.
Article en En | MEDLINE | ID: mdl-25148343
ABSTRACT
We study the electronic screening mechanisms of the effective Coulomb on-site repulsion in hole-doped Sr(14)Cu(24)O(41) compared to undoped La(6)Ca(8)Cu(24)O(41) using polarization dependent high-resolution resonant inelastic x-ray scattering at Cu M edges. By measuring the energy of the effective Coulomb on-site repulsion and the spin excitations, we estimate superexchange and hopping matrix element energies along rungs and legs, respectively. Interestingly, hole doping locally screens the Coulomb on-site repulsion reducing it by as much as 25%. We suggest that the increased ratio of the electronic kinetic to the electronic correlation energy contributes to the local superexchange mediated pairing between holes.
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Bases de datos: MEDLINE Tipo de estudio: Diagnostic_studies / Screening_studies Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article
Buscar en Google
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Bases de datos: MEDLINE Tipo de estudio: Diagnostic_studies / Screening_studies Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article