Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa2Cu3O7–δ

Kwon, Ji -Hwan; Meng, Yifei; Wu, Lijun; Zhu, Yimei; Zhang, Yifei; Selvamanickam, Venkat; Welp, Ulrich; Kwok, Wai -Kwong; Zuo, Jian -Min

doi:10.1088/1361-6668/aad842

Title: Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa₂Cu₃O_7–δ

Journal Article · 31 August 2018 · Superconductor Science and Technology

DOI: https://doi.org/10.1088/1361-6668/aad842 · OSTI ID:1476759

^[1]; Meng, Yifei ^[2]; Wu, Lijun ^[3];

^[3]; Zhang, Yifei ^[4]; Selvamanickam, Venkat ^[5]; Welp, Ulrich ^[6]; Kwok, Wai -Kwong ^[6];

^[2]

Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States); Korea Research Institute of Standards and Science, Daejeon (Republic of Korea)
Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
SuperPower Corp., Schenectady, NY (United States)
Univ. of Houston, Houston, TX (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

In YBa₂Cu₃O_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 CuO₂ plane next to the DCL defect. The DCL defects thus further extend the electronic inhomogeneity into YBCO.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1476759

Report Number(s):: BNL--209146-2018-JAAM

Journal Information:: Superconductor Science and Technology, Journal Name: Superconductor Science and Technology Journal Issue: 10 Vol. 31; ISSN 0953-2048

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Energy dependent structure of Xe ion tracks in YBCO and the effect on the superconductive properties in magnetic fields Suvorova, Elena I.; Degtyarenko, Pavel N.; Karateev, Igor A. Journal of Applied Physics, Vol. 126, Issue 14 https://doi.org/10.1063/1.5120894	journal	October 2019

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Title: Extended electronic structure inhomogeneity created by double chain layer defects surrounding columnar tracks in heavy-ion irradiated YBa₂Cu₃O_7–δ