Impurity susceptibility and the fate of spin-flop transitions in lightly doped La2CuO4 (Articolo in rivista)

Type
Label
  • Impurity susceptibility and the fate of spin-flop transitions in lightly doped La2CuO4 (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.75.140501 (literal)
Alternative label
  • M.B. Silva Neto (1); L. Benfatto (2,3) (2007)
    Impurity susceptibility and the fate of spin-flop transitions in lightly doped La2CuO4
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M.B. Silva Neto (1); L. Benfatto (2,3) (literal)
Pagina inizio
  • 140501(R) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://journals.aps.org/prb/abstract/10.1103/PhysRevB.75.140501 (literal)
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  • 75 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Institut für Theoretische Physik, Universität Stuttgart, Pfaffenwaldring 57, D-70550, Stuttgart, Germany (2) Centro Studi e Ricerche \"Enrico Fermi,\" via Panisperna 89/A, 00184 Rome, Italy (3) CNR-INFM and Department of Physics, University of Rome \"La Sapienza,\" Piazzale Aldo Moro 5, 00185 Rome, Italy (literal)
Titolo
  • Impurity susceptibility and the fate of spin-flop transitions in lightly doped La2CuO4 (literal)
Abstract
  • We investigate the occurrence of a two-step spin-flop transition and spin reorientation when a longitudinal magnetic field is applied to lightly hole doped La2CuO4. We find that for large and strongly frustrating impurities, such as Sr in La2-xSrxCuO4, the huge enhancement of the longitudinal susceptibility suppresses the intermediate flop and the reorientation of spins is smooth and continuous. Contrarily, for small and weakly frustrating impurities, such as O in La2CuO4+y, a discontinuous spin reorientation (two-step spin-flop transition) takes place. Furthermore, we show that for La2-xSrxCuO4 the field dependence of the magnon gaps differs qualitatively from the La2CuO4 case, a prediction to be verified with Raman spectroscopy or neutron scattering. (literal)
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