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Current issue   Ukr. J. Phys. 2014, Vol. 58, N 2, p.195-200


Lisnyi B.M.

Institute for Condensed Matter Physics, Nat. Acad. of Sci. of Ukraine
(1, Svientsitskii Str., Lviv 79011, Ukraine; e-mail: lisnyj@icmp.lviv.ua)

Asymmetric Diamond Ising-Hubbard Chain with Attraction

Section: General problems of theoretical physics
Original Author's Text: Ukrainian

Abstract: The ground state and thermodynamic properties of an asymmetric diamond Ising–Hubbard chain with the on-site electron-electron attraction has been considered. The problem can be solved exactly using the decoration-iteration transformation. In the case of the antiferromagnetic Ising interaction, the influence of this attraction on the ground state and the temperature dependences of the magnetization, magnetic susceptibility, and specific heat has been studied.

Key words: Ising–Hubbard chain, attraction, ground state, magnetization, specific heat.