scholarly journals Bond-operator mean-field theory of the half-filled Kondo lattice model

2001 ◽  
Vol 64 (9) ◽  
Author(s):  
Christoph Jurecka ◽  
Wolfram Brenig
Keyword(s):  
Field Theory ◽  
Lattice Model ◽  
Mean Field Theory ◽  
Mean Field ◽  
Kondo Lattice ◽  
Operator Mean ◽  
Kondo Lattice Model

scholarly journals Bond-Operator Mean Field Theory for the Bilayer Heisenberg Model

1999 ◽  
Vol 68 (1) ◽  
pp. 247-252 ◽  
Author(s):  
Yasuhiro Matsushita ◽  
Martin P. Gelfand ◽  
Chikara Ishii
Keyword(s):  
Field Theory ◽  
Heisenberg Model ◽  
Mean Field Theory ◽  
Mean Field ◽  
Operator Mean

VORTICES IN THE LATTICE MODEL OF PLANAR NEMATIC

1991 ◽  
Vol 05 (04) ◽  
pp. 647-657 ◽  
Author(s):  
D.V. KHVESHCHENKO ◽  
YA. I. KOGAN ◽  
S.K. NECHAEV
Keyword(s):  
Field Theory ◽  
Phase Transition ◽  
Strong Coupling ◽  
Lattice Model ◽  
Mean Field Theory ◽  
Mean Field ◽  
Strong Coupling Expansion ◽  
Theoretical Description ◽  
New Type

The vortices in the planar nematic are investigated using a field-theoretical description in terms of RP2 σ-model. In the limit of strong-coupling expansion the vortices interaction considered in the framework of mean-field theory describes a new type of phase transition.

scholarly journals Phase diagram of an extended Kondo lattice model for manganites: The Schwinger-boson mean-field approach

2000 ◽  
Vol 61 (2) ◽  
pp. 1211-1217 ◽  
Author(s):  
R. Y. Gu ◽  
Z. D. Wang ◽  
Shun-Qing Shen ◽  
D. Y. Xing
Keyword(s):  
Phase Diagram ◽  
Lattice Model ◽  
Mean Field ◽  
Kondo Lattice ◽  
Field Approach ◽  
Kondo Lattice Model
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