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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

Journal Article · · Chinese Physics Letters
 [1];  [1];  [2];  [3]
  1. Chinese Academy of Sciences (CAS), Beijing (China). National Lab. for Superconductivity and Beijing National Lab. for Condensed Matter Physics
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  3. 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 Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI ID:
1336149
Report Number(s):
BNL--112651-2016-JA; KC0201060
Journal Information:
Chinese Physics Letters, Journal Name: Chinese Physics Letters Journal Issue: 6 Vol. 33; ISSN 0256-307X
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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