scholarly journals Excitation Energies in  -Electron Systems: Application of Green's Function Method with Second-Order Perturbation Terms

1976 ◽  
Vol 55 (6) ◽  
pp. 1685-1696 ◽  
Author(s):  
Y. J. I'haya ◽  
S. Narita ◽  
K. Yamaguchi ◽  
M. Nakayama
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Function Method ◽  
Second Order ◽  
Order Perturbation ◽  
Electron Systems ◽  
Excitation Energies ◽  
Green’S Function Method

Utilization of Canonical Transformations for the Vibronic Self-Energies of Coupled Impurity Centers

1973 ◽  
Vol 28 (11) ◽  
pp. 1782-1786 ◽  
Author(s):  
N. N. Kristoffel ◽  
E. Sigmund ◽  
M. Wagner
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Simple Form ◽  
Function Method ◽  
Second Order ◽  
The Self ◽  
Canonical Transformations ◽  
Green’S Function Method ◽  
Non Linear ◽  
Impurity Centers

The self-energies of a system of two electronically coupled impurity centers, one of which inter-acts with the vibrations of the surrounding crystal (Fano system), are derived by use of non-linear canonical transformations. The regions of applicability of this method are discussed and the results compared with those derived by Green’s function techniques in an earlier paper of one of the authors (N. N. K.). The self-energies calculated up to second order have a very simple form and exhibit the correct behaviour also in regions where the results of the Green’s function method are no longer valid.

THE ATOMISTIC GREEN'S FUNCTION METHOD FOR INTERFACIAL PHONON TRANSPORT

2014 ◽  
Vol 17 (N/A) ◽  
pp. 89-145 ◽  
Author(s):  
Sridhar Sadasivam ◽  
Yuhang Che ◽  
Zhen Huang ◽  
Liang Chen ◽  
Satish Kumar ◽  
...  
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Function Method ◽  
Phonon Transport ◽  
Green’S Function Method
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