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Title: Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa 2Cu 3O 7–δ

Abstract

In YBa 2Cu 3O 7–δ (YBCO), heavy-ion irradiation creates continuous amorphous tracks that are highly effective for vortex pinning. However, the electronic structure landscape of defects and consequently their vortex pinning roles are unclear. Here, we show double chain layer (DCL) defects which intersect the columnar tracks are additionally produced by high energy Pb ion irradiation in YBCO. Here, the DCL defects are ~29 nm long, about three times the columnar defect diameter. The electronic structures of the DCL and columnar track defects were determined using atomic-resolution scanning transmission electron microscopy (STEM) and high resolution electron energy loss spectroscopy (EELS). Results show a decrease in the oxygen and copper content at the interface between the track and the YBCO matrix, resulting in interfacial strain. For the DCL defects, the STEM/EELS study revealed a localized electron doped CuO 2 plane next to the DCL defect. The DCL defects thus further extend the electronic inhomogeneity into YBCO.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [3];  [4];  [5];  [6];  [6]; ORCiD logo [2]
  1. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States); Korea Research Institute of Standards and Science, Daejeon (Republic of Korea)
  2. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. SuperPower Corp., Schenectady, NY (United States)
  5. Univ. of Houston, Houston, TX (United States)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1476759
Report Number(s):
BNL-209146-2018-JAAM
Journal ID: ISSN 0953-2048
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Superconductor Science and Technology
Additional Journal Information:
Journal Volume: 31; Journal Issue: 10; Journal ID: ISSN 0953-2048
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; scanning transmission electron microscopy; electron energy loss spectroscopy; high temperature superconductor; double chain layer defect; critical current

Citation Formats

Kwon, Ji -Hwan, Meng, Yifei, Wu, Lijun, Zhu, Yimei, Zhang, Yifei, Selvamanickam, Venkat, Welp, Ulrich, Kwok, Wai -Kwong, and Zuo, Jian -Min. Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa2Cu3O7–δ. United States: N. p., 2018. Web. doi:10.1088/1361-6668/aad842.
Kwon, Ji -Hwan, Meng, Yifei, Wu, Lijun, Zhu, Yimei, Zhang, Yifei, Selvamanickam, Venkat, Welp, Ulrich, Kwok, Wai -Kwong, & Zuo, Jian -Min. Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa2Cu3O7–δ. United States. doi:10.1088/1361-6668/aad842.
Kwon, Ji -Hwan, Meng, Yifei, Wu, Lijun, Zhu, Yimei, Zhang, Yifei, Selvamanickam, Venkat, Welp, Ulrich, Kwok, Wai -Kwong, and Zuo, Jian -Min. Fri . "Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa2Cu3O7–δ". United States. doi:10.1088/1361-6668/aad842. https://www.osti.gov/servlets/purl/1476759.
@article{osti_1476759,
title = {Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa2Cu3O7–δ},
author = {Kwon, Ji -Hwan and Meng, Yifei and Wu, Lijun and Zhu, Yimei and Zhang, Yifei and Selvamanickam, Venkat and Welp, Ulrich and Kwok, Wai -Kwong and Zuo, Jian -Min},
abstractNote = {In YBa2Cu3O7–δ (YBCO), heavy-ion irradiation creates continuous amorphous tracks that are highly effective for vortex pinning. However, the electronic structure landscape of defects and consequently their vortex pinning roles are unclear. Here, we show double chain layer (DCL) defects which intersect the columnar tracks are additionally produced by high energy Pb ion irradiation in YBCO. Here, the DCL defects are ~29 nm long, about three times the columnar defect diameter. The electronic structures of the DCL and columnar track defects were determined using atomic-resolution scanning transmission electron microscopy (STEM) and high resolution electron energy loss spectroscopy (EELS). Results show a decrease in the oxygen and copper content at the interface between the track and the YBCO matrix, resulting in interfacial strain. For the DCL defects, the STEM/EELS study revealed a localized electron doped CuO2 plane next to the DCL defect. The DCL defects thus further extend the electronic inhomogeneity into YBCO.},
doi = {10.1088/1361-6668/aad842},
journal = {Superconductor Science and Technology},
number = 10,
volume = 31,
place = {United States},
year = {2018},
month = {8}
}

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Works referenced in this record:

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