Double-exchange driven ferromagnetic metal-paramagnetic insulator transition in Mn-doped CuO (Articolo in rivista)

Type
Label
  • Double-exchange driven ferromagnetic metal-paramagnetic insulator transition in Mn-doped CuO (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Filippetti, A; Fiorentini, V (2006)
    Double-exchange driven ferromagnetic metal-paramagnetic insulator transition in Mn-doped CuO
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Filippetti, A; Fiorentini, V (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 74 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Cagliari, Sardinian Lab Computat Mat Sci, I-09042 Monserrato, Italy; Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, Italy (literal)
Titolo
  • Double-exchange driven ferromagnetic metal-paramagnetic insulator transition in Mn-doped CuO (literal)
Abstract
  • Employing ab initio self-interaction-corrected local-spin-density calculations, we explain the nature of the ferromagnetic, metallic phase of Mn-doped CuO (an antiferromagnetic insulator when undoped), and of its concurrent transitions to a paramagnetic, insulating phase. Mn-induced donor levels enable conduction through ferromagnetically aligned Mn centers and ferromagnetic CuO planes via double exchange. In the paramagnetic insulating phase, a polaron hopping mechanism consistent with the experiments is envisaged. Our results suggest the intriguing possibility of designing double-exchange driven ferromagnetic cuprates. (literal)
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