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Use of Green's Function to s–d Interaction in Ferromagnetism
Author(s) -
Nicoarǎ I.
Publication year - 1972
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.2220540106
Subject(s) - ferromagnetism , decoupling (probability) , exchange interaction , commutator , function (biology) , physics , mathematics , mathematical physics , condensed matter physics , pure mathematics , algebra over a field , engineering , lie conformal algebra , control engineering , evolutionary biology , biology
The influence of the s‐d interaction on the ferromagnet with S = 1/2 with nearest‐neighbour exchange interaction has been considered using the double‐time Green's functions. The equations of motion have been obtained for two kinds of Green's functions G (−) and G (+), which are derived using commutator and anticommutator, respectively. Expressions are given for the energy shift and damping caused by the s–d interaction, using the decoupling approximation proposed by Katsura and Horiguchi.