Phase Diagram of Metal-Insulator Transition in System with Anderson-Hubbard Centers

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

Abstracts

EN

The model of a strongly correlated system in which periodically spaced Anderson-Hubbard centers are introduced into narrow-band metal is considered. Besides the interactions between localized magnetic moments and strong on-site Coulomb interaction, the model takes into account the hybridization of localized and band states. To study the effect of the lattice deformation on the electrical properties of the system, the phonon term and elastic energy have been taken into account. Green functions for band and localized electrons have been found. On this base, the energy spectrum has been investigated as a function of model parameters, temperature and external pressure. The criterion of the metal-insulator transition for an integer value of electron concentration has been derived and the phase diagram of the metal-insulator transition has been built.

Keywords

EN

75.10.Lp; 71.30.+h

Discipline

• 71.30.+h: Metal-insulator transitions and other electronic transitions
• 75.10.Lp: Band and itinerant models

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 532-534

Dates

published

2012-09

Contributors

author

Yu. Skorenkyy

• Ternopil National Technical University, Physics Department, 56 Ruska Str., Ternopil, Ukraine

author

L. Didukh

• Ternopil National Technical University, Physics Department, 56 Ruska Str., Ternopil, Ukraine

author

O. Kramar

• Ternopil National Technical University, Physics Department, 56 Ruska Str., Ternopil, Ukraine

author

Yu. Dovhopyaty

• Ternopil National Technical University, Physics Department, 56 Ruska Str., Ternopil, Ukraine

References

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• [4] P. Zhang, Q.-K. Xue, Y. Wang, X.C. Xie, Phys. Rev. Lett. 89, 286803 (2002)
• [5] L. Dias da Silva, K. Ingersent, N. Sandler, S.E. Ulloa, Phys. Rev. B 78, 153304 (2008)
• [6] L. Didukh, I. Stasyuk, Ukr. Phys. J. 13, 1774 (1968) (in Russian)
• [7] L. Didukh, I. Stasyuk, Ukr. Phys. J. 20, 97 (1975) (in Russian)
• [8] R. Grygorchuk, I. Stasyuk, Ukr. Phys. J. 25, 404 (1980) (in Russian)
• [9] Yu. Skorenkyy, L. Didukh, O. Kramar, Yu. Dovhopyaty, Acta Phys. Pol. A 111, 635 (2007)

Identifiers

DOI

10.12693/APhysPolA.122.532