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Towards exact solutions for the superconducting T-c induced by electron-phonon interaction | |
Liu, Guo-Zhu1; Yang, Zhao-Kun1; Pan, Xiao-Yin2; Wang, Jing-Rong3 | |
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 | |
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). |
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