Low-temperature expansion of spin Green's functions and Dyson-Maleev formalism

1982 ◽  
Vol 53 (1) ◽  
pp. 1047-1050 ◽  
Author(s):  
V. G. Bar'yakhtar ◽  
V. N. Krivoruchko ◽  
D. A. Yablonskii
Keyword(s):  
Low Temperature ◽  
Green's Functions ◽  
Green’S Functions ◽  
Temperature Expansion

Remarks on Decoupling Procedures in Green's Function Theory of Ferromagnetism for S = 1/2

1971 ◽  
Vol 49 (7) ◽  
pp. 932-938 ◽  
Author(s):  
J. G. Ramos ◽  
A. A. Gomes
Keyword(s):  
Low Temperature ◽  
Green’S Function ◽  
Green's Function ◽  
Green's Functions ◽  
Function Theory ◽  
Green’S Functions ◽  
Spin Correlation ◽  
Temperature Range ◽  
Almost All

It is the purpose of this work to discuss, for an S = 1/2 ferromagnet, how recently proposed decoupling schemes may be obtained, the validity of the involved assumptions including them, and the consequences in the low-temperature range. It is suggested that the spurious T3 term present in almost all Green's functions approaches is connected to local kinematics violating treatments of the spin correlation.

Temperature field evaluation of a two-dimensional partial heat flow problem through Green's Functions

2019 ◽  
Author(s):  
Guilherme Ramalho Costa ◽  
José Aguiar santos junior ◽  
José Ricardo Ferreira Oliveira ◽  
Jefferson Gomes do Nascimento ◽  
Gilmar Guimaraes
Keyword(s):  
Temperature Field ◽  
Heat Flow ◽  
Green's Functions ◽  
Flow Problem ◽  
Green’S Functions ◽  
Field Evaluation ◽  
Two Dimensional
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