Superconductivity, Charge Density Wave and Charge Kondo States in Systems of Coexisting Itinerant Electrons and Local Pairs

• Authors: M Sidowski , S Robaszkiewicz
• Languages of publication: EN

Abstracts

EN

The properties of a system of coexisting local pairs and itinerant electrons described by the (hard-core) boson-fermion model are discussed. For the first time we include into analysis of the model not only the superconducting and non-ordered (normal) states but also the charge density wave phases as well as the so-called charge Kondo state. Within an extended mean-field approximation, a mutual stability of charge density wave, superconducting and charge Kondo states are determined at T = 0 in the case of half-filled fermionic and bosonic bands.

Keywords

EN

74.20.Mn; 74.20.-z; 75.30.Mb; 71.45.Lr

Discipline

• 74.20.-z: Theories and models of superconducting state
• 71.45.Lr: Charge-density-wave systems(see also 75.30.Fv Spin-density waves)
• 74.20.Mn: Nonconventional mechanisms
• 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 4-5
• Pages: 647-652

Dates

published

2006-04

received

2005-09-25

Contributors

author

M Sidowski

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

S Robaszkiewicz

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

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• 5. S. Robaszkiewicz, Acta Phys. Pol. A, 85, 117, 1994
• 6. M. Sidowski, S. Robaszkiewicz, in preparation
• 7. C. Lacroix, M. Cyrot, Phys. Rev. B, 20, 1969, 1979
• 8. A.R. Ruppenthal, J.R. Iglesias, M.A. Gusmao, Phys. Rev. B, 60, 7321, 1999

Identifiers

DOI

10.12693/APhysPolA.109.647