A Reproducible Approach of Preparing High-Quality Overdoped Bi 2 Sr 2 CaCu 2 O 8+δ Single Crystals by Oxygen Annealing and Quenching Method
- Chinese Academy of Sciences (CAS), Beijing (China). National Lab. for Superconductivity and Beijing National Lab. for Condensed Matter Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
- Chinese Academy of Sciences (CAS), Beijing (China). National Lab. for Superconductivity and Beijing National Lab. for Condensed Matter Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
Here, we report a reproducible approach in preparing high-quality overdoped Bi2Sr2 CaCu2 O8+δ (Bi2212) single crystals by annealing Bi2212 crystals in high oxygen pressure followed by a fast quenching. High-quality overdoped and heavily overdoped Bi2212 single crystals are obtained by controlling the annealing oxygen pressure. Furthermore, we find that, beyond a limit of oxygen pressure that can achieve most heavily overdoped Bi2212 with a Tc ~63 K, the annealed Bi2212 begins to decompose. This accounts for the existence of the hole-doping limit and thus the Tc limit in the heavily overdoped region of Bi2212 by the oxygen annealing process. Our results provide a reliable way in preparing high-quality overdoped and heavily overdoped Bi2212 crystals that are important for studies of the physical properties, electronic structure and superconductivity mechanism of the cuprate superconductors.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC00112704
- OSTI ID:
- 1336149
- Report Number(s):
- BNL-112651-2016-JA; R&D Project: PO010; KC0201060
- Journal Information:
- Chinese Physics Letters, Vol. 33, Issue 6; ISSN 0256-307X
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Selective hybridization between the main band and the superstructure band in the superconductor
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journal | January 2020 |
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