Adiabatic approximation for localized electrons in periodic Anderson model

1998 ◽  
Vol 296 (3-4) ◽  
pp. 298-306 ◽  
Author(s):  
E. Kochetov ◽  
V. Yarunin ◽  
M. Zhuravlev
Keyword(s):  
Anderson Model ◽  
Adiabatic Approximation ◽  
Periodic Anderson Model ◽  
Localized Electrons

scholarly journals Momentum Distribution Functions in a One-Dimensional Extended Periodic Anderson Model

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
I. Hagymási ◽  
J. Sólyom ◽  
Ö. Legeza
Keyword(s):  
Momentum Distribution ◽  
Anderson Model ◽  
Mixed Valence ◽  
Distribution Functions ◽  
Strong Correlations ◽  
Periodic Anderson Model ◽  
One Dimensional ◽  
Conduction Electrons ◽  
Localized Electrons

We study the momentum distribution of the electrons in an extended periodic Anderson model, where the interaction,Ucf, between itinerant and localized electrons is taken into account. In the symmetric half-filled model, due to the increase of the interorbital interaction, thefelectrons become more and more delocalized, while the itinerancy of conduction electrons decreases. Above a certain value ofUcfthefelectrons become again localized together with the conduction electrons. In the less than half-filled case, we observe thatUcfcauses strong correlations between thefelectrons in the mixed valence regime.

Path-integral treatment for localized electrons in the periodic Anderson model

1997 ◽  
Vol 237-238 ◽  
pp. 231-233
Author(s):  
V. Ivanov ◽  
M. Zhuravlev ◽  
V. Yarunin ◽  
R. Pucci
Keyword(s):  
Path Integral ◽  
Anderson Model ◽  
Periodic Anderson Model ◽  
Integral Treatment ◽  
Localized Electrons

Path-Integral Treatment for Localized Electrons in the Periodic Anderson Model

1997 ◽  
Vol 11 (08) ◽  
pp. 1023-1033 ◽  
Author(s):  
V. Ivanov ◽  
R. Pucci ◽  
V. Yarunin ◽  
M. Zhuravlev
Keyword(s):  
Path Integral ◽  
Anderson Model ◽  
Adiabatic Approximation ◽  
Deep Level ◽  
Energy Shift ◽  
Temperature Minimum ◽  
Periodic Anderson Model ◽  
Electron Trajectories ◽  
Thermal Distribution ◽  
Integral Treatment

The partition function of the periodic Anderson model is presented as the path integral over the variables of "slow" localized d-electrons and of "light" conduction s-electrons with the energy half-bandwidth w. The adiabatic approximation is applied for d-electrons with level E<0 through the averaging of the thermal distribution over the "light" s-electron trajectories. The conditions are deduced for the temperature and for the relative positions of s- and d-electron levels, that prove this approximation. Temperature minimum of the effective one-particle d-electron energy with the corresponding maximum of their density of states follow for high temperature and the shallow d-level |E|<w, while the energy shift δ E(T) demonstrates the Kondo-like temperature logarithm. The Hubbard-like behaviour of d-electrons is found for deep level |E|>w and low temperatures.

Superconducting instability in the periodic Anderson model

1998 ◽  
Vol 78 (4) ◽  
pp. 365-374 ◽  
Author(s):  
A. N.Tahvildar-Zadeh, M. H. Hettler, M
Keyword(s):  
Anderson Model ◽  
Periodic Anderson Model

scholarly journals Low-energy scale of the periodic Anderson model

2000 ◽  
Vol 61 (19) ◽  
pp. 12799-12809 ◽  
Author(s):  
Th. Pruschke ◽  
R. Bulla ◽  
M. Jarrell
Keyword(s):  
Anderson Model ◽  
Energy Scale ◽  
Low Energy ◽  
Periodic Anderson Model

scholarly journals Universal Knight shift anomaly in the periodic Anderson model

2014 ◽  
Vol 90 (24) ◽  
Author(s):  
M. Jiang ◽  
N. J. Curro ◽  
R. T. Scalettar
Keyword(s):  
Anderson Model ◽  
Knight Shift ◽  
Periodic Anderson Model
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