Mott transition in ruby lattice Hubbard model

doi:10.1088/1674-1056/28/5/057101

中国物理B ›› 2019, Vol. 28 ›› Issue (5): 57101-057101.doi: 10.1088/1674-1056/28/5/057101

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Mott transition in ruby lattice Hubbard model

An Bao(保安)

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2018-09-26 修回日期:2019-02-27 出版日期:2019-05-05 发布日期:2019-05-05
通讯作者: An Bao E-mail:baoan204@aliyun.com
基金资助:
Project supported by Inner Mongolia Natural Science Foundation, China (Grant No. 06021601).

Mott transition in ruby lattice Hubbard model

An Bao(保安)

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2018-09-26 Revised:2019-02-27 Online:2019-05-05 Published:2019-05-05
Contact: An Bao E-mail:baoan204@aliyun.com
Supported by:
Project supported by Inner Mongolia Natural Science Foundation, China (Grant No. 06021601).

摘要/Abstract

摘要：

Mott transition in a ruby lattice with fermions described by the Hubbard model including on-site repulsive interaction is investigated by combining the cellular dynamical mean-field theory and the continuous-time quantum Monte Carlo algorithm. The effect of temperature and on-site repulsive interaction on the metallic-insulating phase transition in ruby lattice with fermions is discussed based on the density of states and double occupancy. In addition, the magnetic property of each phase is discussed by defining certain magnetic order parameters. Our results show that the antiferromagnetic metal is found at the low temperature and weak interaction region and the antiferromagnetic insulating phase is found at the low temperature and strong interaction region. The paramagnetic metal appears in whole on-site repulsive interaction region when the temperature is higher than a certain value and the paramagnetic insulator appears at the middle scale of temperature and on-site repulsive interaction.

关键词: Mott transition, ruby lattice, Hubbard model, cellular dynamical mean-field theory

Abstract:

Key words: Mott transition, ruby lattice, Hubbard model, cellular dynamical mean-field theory

中图分类号: (Metal-insulator transitions and other electronic transitions)

71.30.+h

71.27.+a (Strongly correlated electron systems; heavy fermions) 71.10.Fd (Lattice fermion models (Hubbard model, etc.))

保安. Mott transition in ruby lattice Hubbard model[J]. 中国物理B, 2019, 28(5): 57101-057101.

An Bao(保安). Mott transition in ruby lattice Hubbard model[J]. Chin. Phys. B, 2019, 28(5): 57101-057101.

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Mott transition in ruby lattice Hubbard model

Mott transition in ruby lattice Hubbard model

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