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Ruderman‐Kittel‐like interaction of electric dipoles in systems with carriers
Author(s) -
Glinchuk M. D.,
Kondakova I. V.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221740119
Subject(s) - dipole , electron , ion , electric dipole moment , magnetic dipole , condensed matter physics , physics , electric dipole transition , bond dipole moment , interaction energy , atomic physics , quantum mechanics , molecule
The energy of indirect interaction of off‐center ions via conduction electrons is derived. The calculations are carried out for ions described by double‐well potentials with the axis along a cubic axis of the lattice. Tunnel motion of ions is taken into account. It was shown that the obtained electric dipole‐dipole interaction V dd depends on the values of the ion electric dipole moment, electron wave vector on the Fermi surface, and is an alternating sign function of the distance between the dipoles. The form of this function for the main part of V dd looks like the well‐known Ruderman‐Kittel interaction of magnetic dipoles. Estimations show that the value of interaction is comparable with the conventional electric dipole‐dipole interaction.