TY - JOUR
T1 - Impurity-induced Mott transitions in partially filled antiferromagnetic states
AU - Yokoyama, Hisatoshi
AU - Sato, Ryo
AU - Kobayashi, Kenji
N1 - Funding Information:
The authors thank Y. Koike, T. Adachi and H. Tsuchiura for useful discussions. This study is supported in part by Grants-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/7/26
Y1 - 2018/7/26
N2 - In view of cuprate superconductors, effects of point-type repulsive impurity potential (V) on partially filled antiferromagnetic (AF) states are studied for a strongly correlated square-lattice Hubbard model (U/t = 12) with a diagonal transfer (t′ =-0.3t), using a variational Monte Carlo method. To simplify interpretation, here we focus on the case of δ imp = δ, where δ imp and δ are densities of impurity sites and doped holes, respectively, with δ = 0.04-0.20. As a result, a filling-control-type Mott transition occurs at V = V M (∼ 2t) irrespective of δ; a partially filled AF state becomes Mott insulating for V > V M. Such impurity-induced Mott transitions extensively appear beyond the above parameter settings.
AB - In view of cuprate superconductors, effects of point-type repulsive impurity potential (V) on partially filled antiferromagnetic (AF) states are studied for a strongly correlated square-lattice Hubbard model (U/t = 12) with a diagonal transfer (t′ =-0.3t), using a variational Monte Carlo method. To simplify interpretation, here we focus on the case of δ imp = δ, where δ imp and δ are densities of impurity sites and doped holes, respectively, with δ = 0.04-0.20. As a result, a filling-control-type Mott transition occurs at V = V M (∼ 2t) irrespective of δ; a partially filled AF state becomes Mott insulating for V > V M. Such impurity-induced Mott transitions extensively appear beyond the above parameter settings.
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U2 - 10.1088/1742-6596/1054/1/012014
DO - 10.1088/1742-6596/1054/1/012014
M3 - Conference article
AN - SCOPUS:85051329040
VL - 1054
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012014
T2 - 30th International Symposium on Superconductivity, ISS 2017
Y2 - 13 December 2017 through 15 December 2017
ER -