Mott-Hubbard transition in infinite dimensions

Details Mott-Hubbard transition in infinite dimensions Mott-Hubbard transition in infinite dimensions

2001-05-26

arxiv.org/abs/cond-mat/0105504v2

Phys. Rev. B 64, 235109 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages with 3 figures, text and figures revised

Scientific paper

10.1103/PhysRevB.64.235109

We analyze the unanalytical structure of metal-insulator transition (MIT) in infinite dimensions. By introducing a simple transformation into the dynamical mean-field equation of Hubbard model, a multiple-valued structure in Green's function and other thermodynamical quantities with respect to the interaction strength $U$ are found at low temperatures. A unified description of stable, metastable and unstable phases is obtained in the regime $U_{c1}(T)0$ evolves into second-order one at $U_{c2}(0)$ for $T=0 $. The phase diagram near MIT is presented.

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