Abstract
We study the Mott transition in the half-filled Hubbard model with spatially alternating interactions by means of the coherent potential approximation. The phase boundary between metallic and insulating phases at zero temperature is derived and the nature of the Mott states is also considered. Our results are in good agreement with the ones recently obtained by the two-site dynamical mean-field theory.
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B.C. Regal et al., Phys. Rev. Lett. 92, 040403 (2004)
C. Chin et al., Science 305, 1128 (2004)
M.W. Zwierlein et al., Phys. Rev. Lett. 91, 250401 (2003)
I. Bloch, Nat. Phys. 1, 23 (2005)
U. Schneider et al., Science 322, 1520 (2008)
T. Rom et al., Phys. Rev. Lett. 93, 72022 (2004)
C. Ryu et al., arXiv:cond-mat/0508201 (2005)
T. Esslinger, Ann. Rev. Cond. Mat. Phys. 1, 129 (2010)
Y.H. Chen et al., Phys. Rev. A 82, 043625 (2010)
W. Wu et al., Phys. Rev. B 82, 245102 (2010)
Y.H. Chen et al., Phys. Rev. Lett. 108, 246402 (2012)
R. Yamazaki et al., Phys. Rev. Lett. 105, 050405 (2010)
T. Saitou et al., J. Supercond. Nov. Magn. 26, 1771 (2013)
A. Koga et al., J. Phys. Soc. Jpn 82, 024401 (2013)
B. Velicky et al., Phys. Rev. 175, 747 (1968)
G. Czycholl, Phys. Rep. 143, 277 (1986)
A.T. Hoang et al., J. Phys.: Condens. Matter 14, 6639 (2002)
A.T. Hoang, J. Phys.: Condens. Matter 22, 095602 (2009)
D.A. Le, Mod. Phys. Lett. B 27, 1350046 (2013)
R. Pietig et al., Phys. Rev. Lett. 82, 4046 (1999)
K. Byczuk et al., Phys. Rev. B 79, 121103 (R) (2009)
A. Georges et al., Rev. Mod. Phys. 68, 13 (1996)
R. Bulla et al., Eur. Phys. J. B 13, 257 (2000)
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Le, DA., Tran, TTT. & Hoang, AT. Coherent potential approximation study of the Mott transition in optical lattice system with site-dependent interactions. Eur. Phys. J. B 86, 503 (2013). https://doi.org/10.1140/epjb/e2013-40896-1
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DOI: https://doi.org/10.1140/epjb/e2013-40896-1