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Green function theory of a semi‐infinite ising ferromagnet in a transverse field
Author(s) -
Shiwai B. A.,
Cottam M. G.
Publication year - 1986
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.2221340218
Subject(s) - ising model , transverse field , condensed matter physics , transverse plane , ferromagnetism , function (biology) , physics , field (mathematics) , equations of motion , spin (aerodynamics) , mathematics , quantum mechanics , thermodynamics , engineering , structural engineering , evolutionary biology , pure mathematics , biology
A Green function equation‐of‐motion method is employed to calculate the dynamic properties of a semi‐infinite spin system (or pseudo‐spin system) described by the Ising model in a transverse field. The excitations of the system are shown to be the bulk and surface spin waves, and the Green functions are employed to evaluate their spectral intensities and integrated power factors at temperatures above the transition temperature T c . Some numerical examples are also included.