Disappearance of Superconductivity Due to Vanishing Coupling in the Overdoped BiSrCaCuO
arXiv:1905.01370 · doi:10.1038/s41467-020-14282-4
Abstract
In high-temperature cuprate superconductors, superconductivity is accompanied by a "plethora of orders", and phenomena that may compete, or cooperate with superconductivity, but which certainly complicate our understanding of origins of superconductivity in these materials. While prominent in the underdoped regime, these orders are known to significantly weaken or completely vanish with overdoping. Here, we approach the superconducting phase from the more conventional highly overdoped side. We present angle-resolved photoemission spectroscopy (ARPES) studies of BiSrCaCuO (Bi2212) single crystals cleaved and annealed in ozone to increase the doping all the way to the metallic, non-superconducting phase. We show that the mass renormalization in the antinodal region of the Fermi surface, associated with the structure in the quasiparticle self-energy, that possibly reflects the pairing interaction, monotonically weakens with increasing doping and completely disappears precisely where superconductivity disappears. This is the direct evidence that in the overdoped regime, superconductivity is determined by the coupling strength. A strong doping dependence and an abrupt disappearance above the transition temperature () eliminate the conventional phononic mechanism of the observed mass renormalization and identify the onset of spin-fluctuations as its likely origin.
8 pages, 4 figures
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- Quantum size effects, multiple Dirac cones and edge states in ultrathin Bi(110) films
- Colossal band renormalization and stoner ferromagnetism induced by electron-antiferromagnetic-magnon coupling
- Ubiquitous Coexisting Electron-Mode Couplings in High Temperature Cuprate Superconductors
- From non-metal to strange metal at the stripe-percolation transition in LaSrCuO
- Electron self-energy from quantum charge fluctuations in the layered t-J model with long-range Coulomb interaction
- Origin of Suppression of Proximity Induced Superconductivity in Bi/BiSrCaCuO Heterostructure
- Evidence of electron interaction with an unidentified bosonic mode in superconductor CsCaFeAsF
- Hole-Like Fermi Surface in the Overdoped Non-Superconducting BiPbSrCuO
- Local correlations necessitate waterfalls as a connection between quasiparticle band and developing Hubbard bands
- Standard behaviour of Bi2Sr2CaCu2O8+d overdoped
- Calculations of Spin Fluctuation Spectral Functions in High-Temperature Superconducting Cuprates
- Shallow core levels, or how to determine the doping and of BiSrCaCuO and BiSrCuO without cooling
- Anisotropic electron damping and energy gap in BiSrCaCuO
- Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors