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Title: 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

Here, we report a reproducible approach in preparing high-quality overdoped Bi 2Sr 2 CaCu 2 O 8+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 T c ~63 K, the annealed Bi2212 begins to decompose. This accounts for the existence of the hole-doping limit and thus the T c 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.
Authors:
 [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)
Publication Date:
Report Number(s):
BNL-112651-2016-JA
Journal ID: ISSN 0256-307X; R&D Project: PO010; KC0201060
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Chinese Physics Letters
Additional Journal Information:
Journal Volume: 33; Journal Issue: 6; Journal ID: ISSN 0256-307X
Publisher:
IOP Publishing
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1336149