Auxiliary dynamical mean-field approach for Anderson-Hubbard model with off-diagonal disorder

doi:arXiv:2502.07353

	Auxiliary dynamical mean-field approach for Anderson-Hubbard model with off-diagonal disorder
	Zhang, Zelei1 ; Yan, Jiawei 2; Huang, Li 3; Ke, Youqi1
	2025-02-11
状态	已发表
摘要	This work reports a theoretical framework that combines the auxiliary coherent potential approximation (ACPA-DMFT) with dynamical mean-field theory to study strongly correlated and disordered electronic systems with both diagonal and off-diagonal disorders. In this method, by introducing an auxiliary coupling space with extended local degree of freedom,the diagonal and off-diagonal disorders are treated in a unified and self-consistent framework of coherent potential approximation, within which the dynamical mean-field theory is naturally combined to handle the strongly correlated Anderson-Hubbard model. By using this approach, we compute matsubara Green's functions for a simple cubic lattice at finite temperatures and derive impurity spectral functions through the maximum entropy method. Our results reveal the critical influence of off-diagonal disorder on Mott-type metal-insulator transitions. Specifically, a reentrant phenomenon is identified, where the system transitions between insulating and metallic states under varying interaction strengths. The ACPA-DMFT method provides an efficient and robust computational method for exploring the intricate interplay of disorder and strong correlations.
语种	英语
DOI	arXiv:2502.07353
相关网址	查看原文
出处	Arxiv
收录类别	PPRN.PPRN
WOS记录号	PPRN:121373988
WOS类目	Computer Science, Interdisciplinary Applications ; Physics, Condensed Matter ; Physics, Particles& Fields
资助项目	NSFC["12227901","12274380"]
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/507012
专题	物质科学与技术学院物质科学与技术学院_PI研究组_柯友启组物质科学与技术学院_博士生
通讯作者	Ke, Youqi
作者单位	1.ShanghaiTech Univ, Sch Phys Sci & technol, Shanghai 201210, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, XLAB 2020, Shanghai 200050, Peoples R China 3.China Acad Engn Phys, Inst Mat, Jiangyou 621900, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zelei,Yan, Jiawei,Huang, Li,et al. Auxiliary dynamical mean-field approach for Anderson-Hubbard model with off-diagonal disorder. 2025.