منابع مشابه
Continuum Double Exchange Model
Equilibrium or meta-equilibrium incomplete thermostatistics with different q indices Abstract We discuss a possibility of establishing a nonextensive incomplete statistics based on Tsallis entropy for equilibrium systems with different q values.
متن کاملGround State of the Double Exchange Model
We investigate the electronic correlation effect on the ground-state properties of the double exchange model for manganites by using a semiclassical approach and the slave-boson technique. It is shown that magnetic field has a similar effect on the canted angle between manganese spins as doping concentration does, and the canted angle exhibits weak dependence on the Coulomb interaction. The pos...
متن کامل“Flux” state in double exchange model
We study the ground state properties of the double-exchange systems. The phase factor of the hopping amplitude arises from t2g spin texture in two or more dimensions. A novel “flux” state has a lower energy than the canted antiferromagnetic and spiral spin states. In a certain range of hole doping, a phase separation occurs between the “flux” state and antiferromagnetic states. Constructing a t...
متن کاملA Continuum Model for Metabolic Gas Exchange in Pear Fruit
Exchange of O(2) and CO(2) of plants with their environment is essential for metabolic processes such as photosynthesis and respiration. In some fruits such as pears, which are typically stored under a controlled atmosphere with reduced O(2) and increased CO(2) levels to extend their commercial storage life, anoxia may occur, eventually leading to physiological disorders. In this manuscript we ...
متن کاملContinuous canonical transformation for the double exchange model
The method of continuous canonical transformation is applied to the double exchange model with a purpose to eliminate the interaction term responsible for non conservation of magnon number. Set of differential equations for the effective Hamiltonian parameters is derived. Within the lowest order (approximate) solution we reproduce results of the standard (single step) canonical transformation. ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1999
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.59.11418