Phase Separation near Half-Filling Point in Superconducting Compounds

• Authors: K. Kucab , G. Górski , J. Mizia
• Languages of publication: EN

Abstracts

EN

We present the model of superconducting ceramics using the single band extended Hubbard Hamiltonian. We investigate the simultaneous presence of antiferromagnetism and d-wave superconductivity in the coherent potential approximation applied to the on-site Coulomb repulsion U. We consider the hopping interaction, Δt, the inter-site charge-charge interaction, V (creating superconductivity), and the single site Hund type exchange interaction, F_{in} (creating antiferromagnetism). The influence of these interactions on the separation of superconducting and antiferromagnetic phases near the half-filling point is investigated. Results are compared with the experimental data for YBaCuO and NdCeCuO compounds.

Keywords

EN

71.10.Fd; 74.20.-z; 75.10.Lp

Discipline

• 74.20.-z: Theories and models of superconducting state
• 75.10.Lp: Band and itinerant models
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 4a
• Pages: A-104-A-107

Dates

published

2014-10

Contributors

author

K. Kucab

• Faculty of Mathematics and Natural Sciences, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

author

G. Górski

• Faculty of Mathematics and Natural Sciences, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

author

J. Mizia

• Faculty of Mathematics and Natural Sciences, University of Rzeszów, T. Rejtana 16A, 35-959 Rzeszów, Poland

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Identifiers

DOI

10.12693/APhysPolA.126.A-104