Pair density wave superconductivity: a microscopic model in two dimensions

doi:arXiv:2308.08609

	Pair density wave superconductivity: a microscopic model in two dimensions
	Jiang, Yi-Fan1 ; Yao, Hong 2
	2023-08-16
状态	已发表
摘要	Pair-density-wave (PDW) superconductivity is a long-sought exotic state with oscillating super-conducting order parameter without the need of applying external magnetic field. So far it has been rare in establishing a two-dimensional (2D) microscopic model with such exotic long-range order in its ground state. Here we propose to study PDW superconductivity in a minimal model of spinless fermions on the honeycomb lattice with nearest-neighbor (NN) and next-nearest-neighbor (NNN) interaction V₁ and V₂, respectively. By performing a state-of-the-art density-matrix renormalization group (DMRG) study of this t-V₁-V₂ model at finite doping on six-leg and eight-leg honeycomb cylinders, we showed that the ground state exhibits PDW ordering (namely quasi-long-range order with a divergent PDW susceptibility). Remarkably this PDW state persists on the wider cylinder with 2D-like Fermi surfaces (FS). To the best of our knowledge, this is probably the first controlled numerical evidence of PDW in systems with 2D-like FS.
语种	英语
DOI	arXiv:2308.08609
相关网址	查看原文
出处	Arxiv
收录类别	PPRN.PPRN
WOS记录号	PPRN:85999268
WOS类目	Physics, Condensed Matter
资助项目	National Program on Key Research Project["2021YFA1400100","11825404","21PJ1410300","2022YFA1402703"]
文献类型	预印本
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/381386
专题	物质科学与技术学院物质科学与技术学院_PI研究组_蒋易凡组
通讯作者	Jiang, Yi-Fan
作者单位	1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 2.Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Yi-Fan,Yao, Hong. Pair density wave superconductivity: a microscopic model in two dimensions. 2023.