Excitation spectrum of Hubbard model with infinite electron repulsion on strip-type triangular lattices

Date

2001-02-05

Author

Cheranovskii, VO
Ezerskaya, EV
Krikunov, MV

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The estimations of the stability region of the lattice ferromagnetic ground state in the space of model parameters are found. For the triangular lattice strip formed by L segments with the total number of electrons N = L + 1 we derived the effective Hamiltonians describing the low-energy states of the strips and obtained the analytical estimations for above stability region. The possibility of the magnetic transition with the jump of the ground-state spin between minimal and maximal values has also been shown. For the strip with N = L and an alternating value of the one-site potential energy, we have obtained the exact relation between electron parameters, which provides the ferromagnetic character of the lattice ground state. (C) 2001 John Wiley & Sons, Inc.

Subject Keywords

Ladder compounds, Hubbard model, Ground state, Stability of ferromagnetic state, Magnetic polarons, Magnetic polarons

URI

https://hdl.handle.net/11511/66226

Journal

INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY

Collections

Department of Chemistry, Article

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Citation Formats

V. Cheranovskii, E. Ezerskaya, and M. Krikunov, “Excitation spectrum of Hubbard model with infinite electron repulsion on strip-type triangular lattices,” INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, pp. 253–259, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66226.