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Quantitative determination of the critical points of Mott metal–insulator transition in strongly correlated systems

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【Author】 Yuekun Niu;Yu Ni;Jianli Wang;Leiming Chen;Ye Xing;Yun Song;Shiping Feng;School of Physical Science and Technology,Inner Mongolia University;College of Physics and Electronic Information,Yunnan Normal University;School of Materials Science and Physics,China University of Mining and Technology;Department of Physics,Beijing Normal University;

【通讯作者】牛月坤;宋筠;冯世平;

【机构】 School of Physical Science and Technology,Inner Mongolia University； College of Physics and Electronic Information,Yunnan Normal University； School of Materials Science and Physics China University of Mining and Technology； Department of Physics,Beijing Normal University；

【摘要】 Mottness is at the heart of the essential physics in a strongly correlated system as many novel quantum phenomena occur in the metallic phase near the Mott metal–insulator transition. We investigate the Mott transition in a Hubbard model by using the dynamical mean-field theory and introduce the local quantum state fidelity to depict the Mott metal–insulator transition. The local quantum state fidelity provides a convenient approach to determining the critical point of the Mott transition. Additionally, it presents a consistent description of the two distinct forms of the Mott transition points.更多还原

【Abstract】 Mottness is at the heart of the essential physics in a strongly correlated system as many novel quantum phenomena occur in the metallic phase near the Mott metal–insulator transition. We investigate the Mott transition in a Hubbard model by using the dynamical mean-field theory and introduce the local quantum state fidelity to depict the Mott metal–insulator transition. The local quantum state fidelity provides a convenient approach to determining the critical point of the Mott transition. Additionally, it presents a consistent description of the two distinct forms of the Mott transition points.更多还原

【关键词】 critical point； metal–insulator transition； local quantum state fidelity； strongly correlated system； quasiparticle coherent weight；
【Key words】 critical point； metal–insulator transition； local quantum state fidelity； strongly correlated system； quasiparticle coherent weight；

【基金】 Project supported by the Scientific Research Foundation for Youth Academic Talent of Inner Mongolia University (Grant No.1000023112101/010);the Fundamental Research Funds for the Central Universities of China (Grant No.JN200208);supported by the National Natural Science Foundation of China (Grant No.11474023);supported by the National Key Research and Development Program of China (Grant No.2021YFA1401803);the National Natural Science Foundation of China (Grant Nos.11974051 and 11734002)

【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2024年01期

【分类号】O469
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