Rapid change of superconductivity and electron-phonon coupling through critical doping in Bi-2212.

He, Y; Hashimoto, M; Song, D; Chen, S-D; He, J; Vishik, I M; Moritz, B; Lee, D-H; Nagaosa, N; Zaanen, J; Devereaux, T P; Yoshida, Y; Eisaki, H; Lu, D H; Shen, Z-X

He, Y; Hashimoto, M; Song, D; Chen, S-D; He, J; Vishik, I M; Moritz, B; Lee, D-H; Nagaosa, N; Zaanen, J; Devereaux, T P; Yoshida, Y; Eisaki, H; Lu, D H; Shen, Z-X.

Afiliação

He Y; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA.
Hashimoto M; SIMES, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
Song D; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
Chen SD; National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan.
He J; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA.
Vishik IM; SIMES, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
Moritz B; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA.
Lee DH; SIMES, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
Nagaosa N; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA.
Zaanen J; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA.
Devereaux TP; SIMES, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.
Yoshida Y; Department of Physics, University of California, Berkeley, CA 94720, USA.
Eisaki H; Quantum-Phase Electronics Center, Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
Lu DH; Instituut-Lorentz for Theoretical Physics, Leiden University, Leiden, Netherlands.
Shen ZX; Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, CA 94305, USA.

Science ; 362(6410): 62-65, 2018 10 05.

Article em En | MEDLINE | ID: mdl-30287656

ABSTRACT

ABSTRACT

Electron-boson coupling plays a key role in superconductivity for many systems. However, in copper-based high-critical temperature (T c) superconductors, its relation to superconductivity remains controversial despite strong spectroscopic fingerprints. In this study, we used angle-resolved photoemission spectroscopy to find a pronounced correlation between the superconducting gap and the bosonic coupling strength near the Brillouin zone boundary in Bi2Sr2CaCu2O8+Î´ The bosonic coupling strength rapidly increases from the overdoped Fermi liquid regime to the optimally doped strange metal, concomitant with the quadrupled superconducting gap and the doubled gap-to-T c ratio across the pseudogap boundary. This synchronized lattice and electronic response suggests that the effects of electronic interaction and the electron-phonon coupling (EPC) reinforce each other in a positive-feedback loop upon entering the strange-metal regime, which in turn drives a stronger superconductivity.

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Estados Unidos

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