TY - JOUR
T1 - Intersite electron correlations in a Hubbard model on inhomogeneous lattices
AU - Takemori, Nayuta
AU - Koga, Akihisa
AU - Hafermann, Hartmut
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2016/2/5
Y1 - 2016/2/5
N2 - We study intersite electron correlations in the half-filled Hubbard model on square lattices with periodic and open boundary conditions by means of a real-space dual fermion approach. By calculating renormalization factors, we clarify that nearest-neighbor intersite correlations already significantly reduce the critical interaction. The Mott transition occurs at U/t ∼ 6.4, where U is the interaction strength and t is the hopping integral. This value is consistent with quantum Monte Carlo results. It shows the importance of short-range intersite correlations, which are taken into account in the framework of the real-space dual fermion approach.
AB - We study intersite electron correlations in the half-filled Hubbard model on square lattices with periodic and open boundary conditions by means of a real-space dual fermion approach. By calculating renormalization factors, we clarify that nearest-neighbor intersite correlations already significantly reduce the critical interaction. The Mott transition occurs at U/t ∼ 6.4, where U is the interaction strength and t is the hopping integral. This value is consistent with quantum Monte Carlo results. It shows the importance of short-range intersite correlations, which are taken into account in the framework of the real-space dual fermion approach.
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U2 - 10.1088/1742-6596/683/1/012040
DO - 10.1088/1742-6596/683/1/012040
M3 - Conference article
AN - SCOPUS:84962815593
VL - 683
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012040
T2 - TMU International Symposium on New Quantum Phases Emerging from Novel Crystal Structure
Y2 - 24 September 2015 through 25 September 2015
ER -