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Thermodynamic Properties of One-Dimensional Hubbard Model at Finite Temperatures.
- Source :
- International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics; 8/10/2003, Vol. 17 Issue 18-20, p3354, 5p
- Publication Year :
- 2003
-
Abstract
- The phase diagram and thermodynamic properties of the Hubbard model in one dimension are calculated numerically within the generalized self-consistent approach over a wide range of temperature T, magnetic field h, interaction strength U/t and electron concentration n. The temperature variation of the transverse magnetization, double occupied sites and chemical potential at various n, U/t and h is also analyzed. The wave vector q for the magnetic order parameter in the vicinity of the half-filling in the metallic phase shows a crossover from incommensurate magnetic phase (0<q<π) into the state with strong antiferromagnetic correlations (q=π) as temperature is increased. Overall our numerical results in the approximate theory at finite temperatures are in good quantitative and qualitative agreement with the Bethe-ansatz results. [ABSTRACT FROM AUTHOR]
- Subjects :
- HUBBARD model
BETHE-ansatz technique
THERMODYNAMICS
MAGNETIC fields
Subjects
Details
- Language :
- English
- ISSN :
- 02179792
- Volume :
- 17
- Issue :
- 18-20
- Database :
- Complementary Index
- Journal :
- International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 10849459
- Full Text :
- https://doi.org/10.1142/S0217979203020971