Remark on the Hopping Transition Probability of Polaron Holes in NiO

1966/01/14 by J. Appel · 1 citation
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism

paper · doi:10.1103/physrev.141.506

Abstract

For the hopping motion of polaron holes the frequency factor W₀ of the transition probability is determined by the observation that hole localization occurs in a molecular orbital of the irreducible set t_2g of a cation site group (with transfer integral b_\ensuremathπ), whereas the superexchange mechanism is caused by virtual charge transfers between molecular orbitals of the irreducible set e_g (with transfer integral b_\ensuremathσ). The effect of short-range magnetic ordering on W₀ is determined by the time-dependent spin-pair correlation function \ensuremathγ_ij(t) for neighbor cations i and j and for times t\ensuremath≫t₀=relaxationtimeforthecorrelation.

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