Rapid change of superconductivity and electron-phonon coupling through 19% doping in Bi2212
Electron-boson coupling plays a key role in superconductivity for many systems. However, in copper-based high-temperature (\(T_c\)) superconductors, its relation to superconductivity remains controversial despite strong spectroscopic fingerprints. Here we use angle-resolved photoemission spectroscop...
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| creator | He, Yu Hashimoto, Makoto Song, Dongjoon Chen, Sudi He, Junfeng Vishik, Inna M Moritz, Brian Lee, Dunghai Nagaosa, Naoto Zaanen, Jan Devereaux, Thomas P Yoshida, Yoshiyuki Eisaki, Hiroshi Lu, Donghui Shen, Zhi-Xun |
| description | Electron-boson coupling plays a key role in superconductivity for many systems. However, in copper-based high-temperature (\(T_c\)) superconductors, its relation to superconductivity remains controversial despite strong spectroscopic fingerprints. Here we use angle-resolved photoemission spectroscopy to find a striking correlation between the superconducting gap and the bosonic coupling strength near the Brillouin zone boundary in Bi\(_2\)Sr\(_2\)CaCu\(_2\)O\(_{8+\delta}\). 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-Tc ratio across the pseudogap boundary. This synchronized lattice and electronic response suggests that the effects of electronic interaction and the electron-phonon coupling become intimately entangled upon entering the strange metal regime, which may in turn drive a stronger superconductivity. |
| doi_str_mv | 10.48550/arxiv.1809.07437 |
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However, in copper-based high-temperature (\(T_c\)) superconductors, its relation to superconductivity remains controversial despite strong spectroscopic fingerprints. Here we use angle-resolved photoemission spectroscopy to find a striking correlation between the superconducting gap and the bosonic coupling strength near the Brillouin zone boundary in Bi\(_2\)Sr\(_2\)CaCu\(_2\)O\(_{8+\delta}\). 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-Tc ratio across the pseudogap boundary. This synchronized lattice and electronic response suggests that the effects of electronic interaction and the electron-phonon coupling become intimately entangled upon entering the strange metal regime, which may in turn drive a stronger superconductivity.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1809.07437</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Brillouin zones ; Coupling ; Electrons ; High temperature ; Phonons ; Photoelectric emission ; Physics - Strongly Correlated Electrons ; Physics - Superconductivity ; Superconductivity</subject><ispartof>arXiv.org, 2018-09</ispartof><rights>2018. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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However, in copper-based high-temperature (\(T_c\)) superconductors, its relation to superconductivity remains controversial despite strong spectroscopic fingerprints. Here we use angle-resolved photoemission spectroscopy to find a striking correlation between the superconducting gap and the bosonic coupling strength near the Brillouin zone boundary in Bi\(_2\)Sr\(_2\)CaCu\(_2\)O\(_{8+\delta}\). 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-Tc ratio across the pseudogap boundary. 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| subjects | Brillouin zones Coupling Electrons High temperature Phonons Photoelectric emission Physics - Strongly Correlated Electrons Physics - Superconductivity Superconductivity |
| title | Rapid change of superconductivity and electron-phonon coupling through 19% doping in Bi2212 |
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