Exchange-transfer in mixed-valence clusters with one migrating hole

J. J. Borrás-Almenar, E. Coronado, R. Georges, A. V. Palii, B. S. Tsukerblat

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11 Scopus citations

Abstract

A new mechanism for exchange-transfer specific to hole-type mixed-valence clusters is proposed. The intermediate state in the second-order exchange-transfer process is achieved by the jump of the electron from the spin-core of the dn+1 ion into the empty orbital of the dn ion. As distinguished from the mixed-valence clusters with one delocalized electron this intermediate state is the high-spin one giving rise to a ferromagnetic contribution to the ground manifold. On the basis of angular momentum theory a general solution of the exchange-transfer problem is given for arbitrary nuclearity mixed-valence hole-type clusters with many-electron paramagnetic spin-cores. The interplay between the double exchange, exchange-transfer and Heisenberg exchange is considered in detail for the simple case of a d2-d2-d1 trimer.

Original languageEnglish
Pages (from-to)7-14
Number of pages8
JournalChemical Physics Letters
Volume249
Issue number1-2
DOIs
StatePublished - 26 Jan 1996
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)
  • Physical and Theoretical Chemistry

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