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Localized Hole States in a Two‐Dimensional Antiferromagnet
Author(s) -
Rubin P.,
Sherman A.
Publication year - 1991
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.2221660117
Subject(s) - antiferromagnetism , condensed matter physics , impurity , physics , hubbard model , connection (principal bundle) , homogeneous space , quantum mechanics , superconductivity , mathematics , geometry
A connection between band excitations and sublattices in the Hubbard antiferromagnet leads to the appearance of two types of localized states arising due to an impurity on the “own” (for given band excitations) and “alien” sublattices. In the case of the substitutional impurity the conditions of the appearance of these localized states, their energies and symmetries are obtained in dependence on the ratio of the exchange constant to the hopping matrix element. These dependences and the number of the localized levels are different for the two types of states mentioned.