Towards exact solutions for the superconducting T-c induced by electron-phonon interaction

doi:10.1103/PhysRevB.103.094501

HFCAS OpenIR

	Towards exact solutions for the superconducting T-c induced by electron-phonon interaction
	Liu, Guo-Zhu 1; Yang, Zhao-Kun 1; Pan, Xiao-Yin 2; Wang, Jing-Rong 3
	2021-03-03
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
通讯作者	Liu, Guo-Zhu(gzliu@ustc.edu.cn)
摘要	Electron-phonon interaction plays an important role in metals and can lead to superconductivity and other instabilities. Previous theoretical studies on superconductivity are largely based on the Migdal-Eliashberg theory, which neglects all the vertex corrections to electron-phonon coupling and breaks down in many unconventional superconductors. Here, we go beyond the Migdal-Eliashberg approximation and develop a nonperturbative Dyson-Schwinger equation approach to deal with the superconducting transition. Remarkably, we take into account all the vertex corrections by solving two coupled Ward-Takahashi identities derived from two global U(1) symmetries and rigorously prove that the fully renormalized electron propagator satisfies a self-closed integral equation that is directly amenable to numerical computations. Our approach works equally well in the weak and strong coupling regimes and provides an efficient method to determine superconducting T-c and other quantities. As an application, our approach is used to investigate the high-T-c superconductivity in one-unit-cell FeSe/SrTiO3.
DOI	10.1103/PhysRevB.103.094501
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[11574285] ; National Natural Science Foundation of China[11674327] ; National Natural Science Foundation of China[U1532267] ; National Natural Science Foundation of China[U1832209]
项目资助者	National Natural Science Foundation of China
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000627550000001
出版者	AMER PHYSICAL SOC
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/121045
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Guo-Zhu
作者单位	1.Univ Sci & Technol China, Dept Modem Phys, Hefei 230026, Anhui, Peoples R China 2.Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China 3.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Liu, Guo-Zhu,Yang, Zhao-Kun,Pan, Xiao-Yin,et al. Towards exact solutions for the superconducting T-c induced by electron-phonon interaction[J]. PHYSICAL REVIEW B,2021,103.
APA	Liu, Guo-Zhu,Yang, Zhao-Kun,Pan, Xiao-Yin,&Wang, Jing-Rong.(2021).Towards exact solutions for the superconducting T-c induced by electron-phonon interaction.PHYSICAL REVIEW B,103.
MLA	Liu, Guo-Zhu,et al."Towards exact solutions for the superconducting T-c induced by electron-phonon interaction".PHYSICAL REVIEW B 103(2021).