Mott Transition, Ferromagnetism and Conductivity in the Generalized Hubbard Model

• Authors: Yu. Skorenkyy , L. Didukh , O. Kramar , Yu. Dovhopyaty
• Languages of publication: EN

Abstracts

EN

The electron correlations in narrow energy bands are examined within the framework of the Hubbard model, generalized by taking into account the correlated hopping of electrons. Electronic conductivity and ferromagnetic ordering stabilization in the system with various forms of electronic density of states are studied. The influence of magnetic field, temperature and the form of density of states on concentration dependence of conductivity and magnetization is investigated. The correlated hopping is shown to cause the electron-hole asymmetry of transport and ferromagnetic properties of narrow band materials.

Keywords

EN

71.10.Fd; 71.27.+a

Discipline

• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 111
• Issue: 4
• Pages: 635-644

Dates

published

2007-04

received

2006-09-14

Contributors

author

Yu. Skorenkyy

• Ternopil State Technical University, Ternopil, Ukraine

author

L. Didukh

• Ternopil State Technical University, Ternopil, Ukraine

author

O. Kramar

• Ternopil State Technical University, Ternopil, Ukraine

author

Yu. Dovhopyaty

• Ternopil State Technical University, Ternopil, Ukraine

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Identifiers

DOI

10.12693/APhysPolA.111.635