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Physica B: Condensed Matter 531, 110–113 (2018)

ISSN: 0921-4526, SCI

Electronic phase diagram in the half-filled ionic Hubbard model with site-dependent interactions

Anh-Tuan Hoang, Thi-Hai-Yen Nguyen, Duc-Anh Le

The ionic Hubbard model with spatially alternating interactions, which may be realized by cold atoms in optical lattices, is studied by mean of the coherent potential approximation. The paramagnetic phase diagram for the half-filled model at zero temperature is obtained. The possibility of enlarging an intermediate metallic region in the parameter space is addressed.

URL: https://doi.org/10.1016/j.physb.2017.12.006