scholarly journals Mean-field theory of charge ordering and phase transitions in the colossal-magnetoresistive manganites

1999 ◽  
Vol 11 (43) ◽  
pp. 8561-8578 ◽  
Author(s):  
S K Mishra ◽  
Rahul Pandit ◽  
S Satpathy
Keyword(s):  
Field Theory ◽  
Phase Transitions ◽  
Mean Field Theory ◽  
Mean Field ◽  
Charge Ordering ◽  
Colossal Magnetoresistive

Mean-Field Theory of Intra-Molecular Charge Ordering in (TTM–TTP)I3

2011 ◽  
Vol 80 (2) ◽  
pp. 024707 ◽  
Author(s):  
Yukiko Omori ◽  
Masahisa Tsuchiizu ◽  
Yoshikazu Suzumura
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Charge Ordering ◽  
Molecular Charge

Charge Ordering of Multiferroic LuFe2O4: Influence of Doping and Electric Field

2015 ◽  
Vol 233-234 ◽  
pp. 375-378
Author(s):  
Dmitry Andreevich Maslov ◽  
Yuri Borislavovich Kudasov
Keyword(s):  
Field Theory ◽  
Dipole Moment ◽  
Electric Field ◽  
Mean Field Theory ◽  
Mean Field ◽  
Correlation Effect ◽  
Charge Ordering ◽  
Parameter Correlation ◽  
Antiferroelectric Phase ◽  
Temperature State

Charge ordering of nonstoichiometric LuFe2O4+δ is discussed. Properties of triangular bilayer are investigated via mean field theory with Coulomb interaction between sites. It is shown that low temperature state of bilayer has dipole moment essentially under any doping parameter. Correlation between sites in neighbor layers is estimated and dimer partially disordered antiferroelectric phase is extended for the case of nonstoichiometric samples. Competition of correlation effect with bilayer interaction and external electric field is discussed. Phase diagrams for doped specimen are presented. The results of investigation are used to clarify a significant surface impact.

Two-State Mean-Field Theory of Reentrant Phase Transitions

1985 ◽  
Vol 128 (1) ◽  
pp. 169-175 ◽  
Author(s):  
G. F. Kventsel ◽  
J. Katriel
Keyword(s):  
Field Theory ◽  
Phase Transitions ◽  
Mean Field Theory ◽  
Mean Field
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