Superconductivity versus Diagonal Disorder in the (Hard-Core) Boson-Fermion Model

• Authors: G. Pawłowski , S. Robaszkiewicz , R. Micnas
• Languages of publication: EN

Abstracts

EN

The influence of randomness of local pair site energies on superconducting properties of a system of coexisting local pairs and itinerant electrons described by the (hard-core) boson-fermion model is analyzed within variational BCS Hartree-Fock approach. Assuming the rectangular distribution function of the random potential the phase diagrams, critical temperatures, and the chemical potential behaviours are determined.

Keywords

EN

71.45.Lr; 71.55.Jv; 74.20.-z

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)
• 71.55.Jv: Disordered structures; amorphous and glassy solids

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 106
• Issue: 5
• Pages: 745-749

Dates

published

2004-11

received

2004-06-06

Contributors

author

G. Pawłowski

• 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

author

R. Micnas

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

References

• 1. S. Robaszkiewicz, R. Micnas, J. Ranninger, Phys. Rev. B, 36, 180, 1987; J. Ranninger, S. Robaszkiewicz,Physica B, 135, 468, 1985
• 2. R. Micnas, J. Ranninger, S. Robaszkiewicz, Rev. Mod. Phys., 62, 113, 1990 and references therein
• 3. R. Micnas, S. Robaszkiewicz, in: High-T_c Superconductivity 1996: Ten Years after the Discovery, Eds. E. Kaldis, E. Liarokapis, K.A. Muller, NATO ASI Series E, Vol. 342, Kluwer Academic Publishers, The Netherlands 1997, p. 31 and references therein
• 4. R. Micnas, S. Robaszkiewicz, A. Bussmann-Holder, Phys. Rev. B, 66, 104516, 2002
• 5. See e.g. Y. Ohashi, A. Griffin, Phys. Rev. Lett., 89, 130402, 2002
• 6. G. Pawl owski, S. Robaszkiewicz, Mol. Phys. Rep., 34/1, 76, 2001; Phys. Status Solidi B, 236, 400, 2003
• 7. T. Domański, K.I. Wysokiński, Phys. Rev. B, 66, 064517, 2002
• 8. G. Pawlowski, S. Robaszkiewicz, R. Micnas, J. Supercond., 17, 33, 2004

Identifiers

DOI

10.12693/APhysPolA.106.745