Effect of On-Site Coulomb Repulsion on Phase Transitions in Exactly Solved Spin-Electron Model

• Authors: L. Gálisová , J. Strečka , A. Tanaka , T. Verkholyak
• Languages of publication: EN

Abstracts

EN

A hybrid lattice-statistical model on doubly decorated planar lattices, which have localized Ising spins at their nodal lattice sites and two itinerant electrons at each pair of decorating sites, is exactly solved by the use of a generalized decoration-iteration transformation. Our main attention is focused on an influence of the on-site Coulomb repulsion on ground-state properties and critical behavior of the investigated system.

Keywords

EN

05.50.+q; 05.70.Jk; 64.60.Cn; 64.60.De

Discipline

• 64.60.De: Statistical mechanics of model systems (Ising model, Potts model, field-theory models, Monte Carlo techniques, etc.)
• 05.50.+q: Lattice theory and statistics (Ising, Potts, etc.)(see also 64.60.Cn Order-disorder transformations, and 75.10.Hk Classical spin models)
• 64.60.Cn: Order-disorder transformations(see also 81.30.Hd Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder in materials science; for effects of disorder on superconducting transition temperature, see 74.62.En)
• 05.70.Jk: Critical point phenomena(for quantum critical phenomena in superconductivity, see 74.40.Kb)

• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 942-943

Dates

published

2010-11

Contributors

author

L. Gálisová

• Department of Applied Mathematics, Faculty of Mechanical Engineering, Technical University, Letná 9, 042 00 Košice, Slovak Republic

author

J. Strečka

• Department of Theoretical Physics and Astrophysics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovak Republic

author

A. Tanaka

• Department of General Education, Ariake National College of Technology, Omuta, Fukuoka 836-8585, Japan

author

T. Verkholyak

• Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, 1 Svientsitskii Str., L'viv-11, 790 11, Ukraine

References

• 1. F.Y. Wu, Exactly Solved Models: A Journey in Statistical Mechanics, World Sci., Singapore 2009
• 2. M.E. Fisher, Phys. Rev. 113, 969 (1959)
• 3. M.S.S. Pereira, F.A.B.F. de Moura, M.L. Lyra, Phys. Rev. B 79, 054427 (2009)
• 4. J. Strečka, A. Tanaka, L. Čanová, T. Verkholyak, Phys. Rev. B 80, 174410 (2009)
• 5. S. Ishiwata, D. Wang, T. Saito, M. Takano, Chem. Mater. 17, 2789 (2005)
• 6. M. Jaščur, J. Strečka, Acta Electrotechnica et Informatica 2, 71 (2002)

Identifiers

DOI

10.12693/APhysPolA.118.942