Ubiquitous Coexisting Electron-mode Couplings in High-temperature Cuprate Superconductors

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2023 Oct 18

PMID 37851678

Authors

Hongtao Yan

Jin Mo Bok

Junfeng He

Wentao Zhang

Qiang Gao

Xiangyu Luo

Yongqing Cai

Yingying Peng

Jianqiao Meng

Cong Li

Hao Chen

Chunyao Song

Chaohui Yin

Taimin Miao

Yiwen Chen

Genda Gu

Chengtian Lin

Fengfeng Zhang

Feng Yang

Shenjin Zhang

Qinjun Peng

Guodong Liu

Lin Zhao

Han-Yong Choi

Zuyan Xu

X J Zhou

Affiliations

Soon will be listed here.

Abstract

In conventional superconductors, electron-phonon coupling plays a dominant role in generating superconductivity. In high-temperature cuprate superconductors, the existence of electron coupling with phonons and other boson modes and its role in producing high-temperature superconductivity remain unclear. The evidence of electron-boson coupling mainly comes from angle-resolved photoemission (ARPES) observations of [Formula: see text]70-meV nodal dispersion kink and [Formula: see text]40-meV antinodal kink. However, the reported results are sporadic and the nature of the involved bosons is still under debate. Here we report findings of ubiquitous two coexisting electron-mode couplings in cuprate superconductors. By taking ultrahigh-resolution laser-based ARPES measurements, we found that the electrons are coupled simultaneously with two sharp modes at [Formula: see text]70meV and [Formula: see text]40meV in different superconductors with different dopings, over the entire momentum space and at different temperatures above and below the superconducting transition temperature. These observations favor phonons as the origin of the modes coupled with electrons and the observed electron-mode couplings are unusual because the associated energy scales do not exhibit an obvious energy shift across the superconducting transition. We further find that the well-known "peak-dip-hump" structure, which has long been considered a hallmark of superconductivity, is also omnipresent and consists of "peak-double dip-double hump" finer structures that originate from electron coupling with two sharp modes. These results provide a unified picture for the [Formula: see text]70-meV and [Formula: see text]40-meV energy scales and their evolutions with momentum, doping and temperature. They provide key information to understand the origin of these energy scales and their role in generating anomalous normal state and high-temperature superconductivity.

References

Kordyuk A, Borisenko S, Zabolotnyy V, Geck J, Knupfer M, Fink J . Constituents of the quasiparticle spectrum along the nodal direction of high-Tc cuprates. Phys Rev Lett. 2006; 97(1):017002. DOI: 10.1103/PhysRevLett.97.017002. View

Zhang W, Liu G, Zhao L, Liu H, Meng J, Dong X . Identification of a new form of electron coupling in the Bi2Sr2CaCu2O8 superconductor by laser-based angle-resolved photoemission spectroscopy. Phys Rev Lett. 2008; 100(10):107002. DOI: 10.1103/PhysRevLett.100.107002. View

Lanzara A, Bogdanov P, Zhou X, Kellar S, Feng D, Lu E . Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors. Nature. 2001; 412(6846):510-4. DOI: 10.1038/35087518. View

Anderson P . Physics. Is there glue in cuprate superconductors?. Science. 2007; 316(5832):1705-7. DOI: 10.1126/science.1140970. View

Cuk T, Baumberger F, Lu D, Ingle N, Zhou X, Eisaki H . Coupling of the B1g phonon to the antinodal electronic states of Bi2Sr2Ca0.92Y0.08Cu2O8+delta. Phys Rev Lett. 2004; 93(11):117003. DOI: 10.1103/PhysRevLett.93.117003. View

Liu G, Wang G, Zhu Y, Zhang H, Zhang G, Wang X . Development of a vacuum ultraviolet laser-based angle-resolved photoemission system with a superhigh energy resolution better than 1 meV. Rev Sci Instrum. 2008; 79(2 Pt 1):023105. DOI: 10.1063/1.2835901. View

Reznik D, Sangiovanni G, Gunnarsson O, Devereaux T . Photoemission kinks and phonons in cuprates. Nature. 2008; 455(7213):E6-7. DOI: 10.1038/nature07364. View

Eschrig M, Norman M . Neutron resonance: modeling photoemission and tunneling data in the superconducting state of Bi2Sr2CaCu2O8+delta. Phys Rev Lett. 2000; 85(15):3261-4. DOI: 10.1103/PhysRevLett.85.3261. View

Giustino F, Cohen M, Louie S . Small phonon contribution to the photoemission kink in the copper oxide superconductors. Nature. 2008; 452(7190):975-8. DOI: 10.1038/nature06874. View

10.

Zhou X, He S, Liu G, Zhao L, Yu L, Zhang W . New developments in laser-based photoemission spectroscopy and its scientific applications: a key issues review. Rep Prog Phys. 2018; 81(6):062101. DOI: 10.1088/1361-6633/aab0cc. View

11.

Sato T, Matsui H, Takahashi T, Ding H, Yang H, Wang S . Observation of band renormalization effects in hole-doped high-Tc Superconductors. Phys Rev Lett. 2003; 91(15):157003. DOI: 10.1103/PhysRevLett.91.157003. View

12.

Reznik , Keimer , Dogan , Aksay . q dependence of self-energy effects of the plane oxygen vibration in YBa2Cu3O7. Phys Rev Lett. 1995; 75(12):2396-2399. DOI: 10.1103/PhysRevLett.75.2396. View

13.

Keimer B, Kivelson S, Norman M, Uchida S, Zaanen J . From quantum matter to high-temperature superconductivity in copper oxides. Nature. 2015; 518(7538):179-86. DOI: 10.1038/nature14165. View

14.

Heid R, Bohnen K, Zeyher R, Manske D . Momentum dependence of the electron-phonon coupling and self-energy effects in superconducting YBa2Cu3O7 within the local density approximation. Phys Rev Lett. 2008; 100(13):137001. DOI: 10.1103/PhysRevLett.100.137001. View

15.

Li Z, Wu M, Chan Y, Louie S . Unmasking the Origin of Kinks in the Photoemission Spectra of Cuprate Superconductors. Phys Rev Lett. 2021; 126(14):146401. DOI: 10.1103/PhysRevLett.126.146401. View

16.

Zhou X, Yoshida T, Lanzara A, Bogdanov P, Kellar S, Shen K . High-temperature superconductors: Universal nodal Fermi velocity. Nature. 2003; 423(6938):398. DOI: 10.1038/423398a. View

17.

Johnston S, Vishik I, Lee W, Schmitt F, Uchida S, Fujita K . Evidence for the importance of extended Coulomb interactions and forward scattering in cuprate superconductors. Phys Rev Lett. 2012; 108(16):166404. DOI: 10.1103/PhysRevLett.108.166404. View

18.

Devereaux T, Cuk T, Shen Z, Nagaosa N . Anisotropic electron-phonon interaction in the cuprates. Phys Rev Lett. 2004; 93(11):117004. DOI: 10.1103/PhysRevLett.93.117004. View

19.

Zheng G, Kuhns P, Reyes A, Liang B, Lin C . Critical point and the nature of the pseudogap of single-layered copper-oxide Bi2Sr2-xLaxCuO6+delta superconductors. Phys Rev Lett. 2005; 94(4):047006. DOI: 10.1103/PhysRevLett.94.047006. View

20.

He H, Sidis Y, Bourges P, Gu G, Ivanov A, Koshizuka N . Resonant spin excitation in an overdoped high temperature superconductor. Phys Rev Lett. 2001; 86(8):1610-3. DOI: 10.1103/PhysRevLett.86.1610. View