Nanoscale coherent intergrowthlike defects in a crystal of made superconducting by high-pressure oxygen annealing
Abstract
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.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- 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)
- 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:
- 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},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 13,
volume = 90,
place = {United States},
year = {Tue Oct 28 00:00:00 EDT 2014},
month = {Tue Oct 28 00:00:00 EDT 2014}
}
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