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Title: Nanoscale coherent intergrowthlike defects in a crystal of La 1.9 Ca 1.1 Cu 2 O 6 + δ made superconducting by high-pressure oxygen annealing

Abstract

Superconductivity with T c = 53.5 K has been induced in a large La₁.₉Ca₁.₁Cu₂O₆ (La-2126) single crystal by annealing in a high partial-pressure of oxygen at 1200°C. Using transmission electron microscopy (TEM) techniques, we show that a secondary Ca-doped La₂CuO₄ (La-214) phase, not present in the as-grown crystal, appears as a coherent “intergrowth” as a consequence of the annealing. A corresponding secondary superconducting transition near 13 K is evident in the magnetization measurement. In this study, electron energy loss spectroscopy (EELS) reveals a pre-edge peak at the O K edge in the superconducting La-2126 phase, which is absent in the as-grown crystal, confirming the hole-doping by interstitial oxygen.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1182488
Alternate Identifier(s):
OSTI ID: 1180482
Report Number(s):
BNL-107343-2015-JA
Journal ID: ISSN 1098-0121; PRBMDO; R&D Project: MA015MACA; PO010; KC0201010; KC0201060
Grant/Contract Number:  
SC00112704; AC02-98CH10886
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 13; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Hu, Hefei, Zhu, Yimei, Shi, Xiaoya, Li, Qiang, Zhong, Ruidan, Schneeloch, John A., Gu, Genda, Tranquada, John M., and Billinge, Simon J. L. Nanoscale coherent intergrowthlike defects in a crystal of La1.9Ca1.1Cu2O6+δ made superconducting by high-pressure oxygen annealing. United States: N. p., 2014. Web. doi:10.1103/PhysRevB.90.134518.
Hu, Hefei, Zhu, Yimei, Shi, Xiaoya, Li, Qiang, Zhong, Ruidan, Schneeloch, John A., Gu, Genda, Tranquada, John M., & Billinge, Simon J. L. Nanoscale coherent intergrowthlike defects in a crystal of La1.9Ca1.1Cu2O6+δ made superconducting by high-pressure oxygen annealing. United States. https://doi.org/10.1103/PhysRevB.90.134518
Hu, Hefei, Zhu, Yimei, Shi, Xiaoya, Li, Qiang, Zhong, Ruidan, Schneeloch, John A., Gu, Genda, Tranquada, John M., and Billinge, Simon J. L. Tue . "Nanoscale coherent intergrowthlike defects in a crystal of La1.9Ca1.1Cu2O6+δ made superconducting by high-pressure oxygen annealing". United States. https://doi.org/10.1103/PhysRevB.90.134518. https://www.osti.gov/servlets/purl/1182488.
@article{osti_1182488,
title = {Nanoscale coherent intergrowthlike defects in a crystal of La1.9Ca1.1Cu2O6+δ made superconducting by high-pressure oxygen annealing},
author = {Hu, Hefei and Zhu, Yimei and Shi, Xiaoya and Li, Qiang and Zhong, Ruidan and Schneeloch, John A. and Gu, Genda and Tranquada, John M. and Billinge, Simon J. L.},
abstractNote = {Superconductivity with Tc = 53.5 K has been induced in a large La₁.₉Ca₁.₁Cu₂O₆ (La-2126) single crystal by annealing in a high partial-pressure of oxygen at 1200°C. Using transmission electron microscopy (TEM) techniques, we show that a secondary Ca-doped La₂CuO₄ (La-214) phase, not present in the as-grown crystal, appears as a coherent “intergrowth” as a consequence of the annealing. A corresponding secondary superconducting transition near 13 K is evident in the magnetization measurement. In this study, electron energy loss spectroscopy (EELS) reveals a pre-edge peak at the O K edge in the superconducting La-2126 phase, which is absent in the as-grown crystal, confirming the hole-doping by interstitial oxygen.},
doi = {10.1103/PhysRevB.90.134518},
url = {https://www.osti.gov/biblio/1182488}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 13,
volume = 90,
place = {United States},
year = {2014},
month = {10}
}

Journal Article:

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Cited by: 1 work
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