Nanoscale interlayer defects in iron arsenides

Q. Zheng; Miaofang Chi; M. Ziatdinov; Li Li; P. Maksymovych; Matt F. Chisholm; Sergei V. Kalinin; Athena S. Sefat

doi:10.1016/j.jssc.2019.06.040

Nanoscale interlayer defects in iron arsenides

Q. Zheng, Miaofang Chi, M. Ziatdinov, Li Li, P. Maksymovych, Matt F. Chisholm, Sergei V. Kalinin, Athena S. Sefat

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Using a local real-space microscopy probe, we discover evidence of nanoscale interlayer defects along the c-crystallographic direction in BaFe₂As₂ (‘122’) based iron-arsenide superconductors. We find ordered 122 atomic arrangements within the ab-plane, and within regions of ~10 to 20 nm size perpendicular to this plane. While the FeAs substructure is very rigid, Ba ions are relatively weakly bound and can be displaced from the 122, forming stacking faults resulting in the physical separation of the 122 between adjacent ordered domains. The evidence for interlayer defects between the FeAs superconducting planes gives perspective on the minimal connection between interlayer chemical disorder and high-temperature superconductivity. In particular, the Cooper pairs may be finding a way around such localized interlayer defects through a percolative path of the ordered layered 122 lattice that may not affect T_c.

Original language	English
Pages (from-to)	422-426
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	277
DOIs	https://doi.org/10.1016/j.jssc.2019.06.040
State	Published - Sep 2019

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan. The research is primarily supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division. The STM and STEM work was sponsored by the Materials Science & Engineering Division of BES DOE and performed through user projects conducted at Center for Nanophase Materials Sciences (CNMS) that is a DOE Office of Science User Facility.

Keywords

High-temperature superconductivity
Iron arsenide
Microscopy
Nanoscale defects

Access to Document

10.1016/j.jssc.2019.06.040

Cite this

@article{c712011fb968469686b703fa24597cf3,

title = "Nanoscale interlayer defects in iron arsenides",

abstract = "Using a local real-space microscopy probe, we discover evidence of nanoscale interlayer defects along the c-crystallographic direction in BaFe2As2 ({\textquoteleft}122{\textquoteright}) based iron-arsenide superconductors. We find ordered 122 atomic arrangements within the ab-plane, and within regions of ~10 to 20 nm size perpendicular to this plane. While the FeAs substructure is very rigid, Ba ions are relatively weakly bound and can be displaced from the 122, forming stacking faults resulting in the physical separation of the 122 between adjacent ordered domains. The evidence for interlayer defects between the FeAs superconducting planes gives perspective on the minimal connection between interlayer chemical disorder and high-temperature superconductivity. In particular, the Cooper pairs may be finding a way around such localized interlayer defects through a percolative path of the ordered layered 122 lattice that may not affect Tc.",

keywords = "High-temperature superconductivity, Iron arsenide, Microscopy, Nanoscale defects",

author = "Q. Zheng and Miaofang Chi and M. Ziatdinov and Li Li and P. Maksymovych and Chisholm, {Matt F.} and Kalinin, {Sergei V.} and Sefat, {Athena S.}",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = sep,

doi = "10.1016/j.jssc.2019.06.040",

language = "English",

volume = "277",

pages = "422--426",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Elsevier",

}

TY - JOUR

T1 - Nanoscale interlayer defects in iron arsenides

AU - Zheng, Q.

AU - Chi, Miaofang

AU - Ziatdinov, M.

AU - Li, Li

AU - Maksymovych, P.

AU - Chisholm, Matt F.

AU - Kalinin, Sergei V.

AU - Sefat, Athena S.

PY - 2019/9

Y1 - 2019/9

N2 - Using a local real-space microscopy probe, we discover evidence of nanoscale interlayer defects along the c-crystallographic direction in BaFe2As2 (‘122’) based iron-arsenide superconductors. We find ordered 122 atomic arrangements within the ab-plane, and within regions of ~10 to 20 nm size perpendicular to this plane. While the FeAs substructure is very rigid, Ba ions are relatively weakly bound and can be displaced from the 122, forming stacking faults resulting in the physical separation of the 122 between adjacent ordered domains. The evidence for interlayer defects between the FeAs superconducting planes gives perspective on the minimal connection between interlayer chemical disorder and high-temperature superconductivity. In particular, the Cooper pairs may be finding a way around such localized interlayer defects through a percolative path of the ordered layered 122 lattice that may not affect Tc.

AB - Using a local real-space microscopy probe, we discover evidence of nanoscale interlayer defects along the c-crystallographic direction in BaFe2As2 (‘122’) based iron-arsenide superconductors. We find ordered 122 atomic arrangements within the ab-plane, and within regions of ~10 to 20 nm size perpendicular to this plane. While the FeAs substructure is very rigid, Ba ions are relatively weakly bound and can be displaced from the 122, forming stacking faults resulting in the physical separation of the 122 between adjacent ordered domains. The evidence for interlayer defects between the FeAs superconducting planes gives perspective on the minimal connection between interlayer chemical disorder and high-temperature superconductivity. In particular, the Cooper pairs may be finding a way around such localized interlayer defects through a percolative path of the ordered layered 122 lattice that may not affect Tc.

KW - High-temperature superconductivity

KW - Iron arsenide

KW - Microscopy

KW - Nanoscale defects

UR - http://www.scopus.com/inward/record.url?scp=85068368981&partnerID=8YFLogxK

U2 - 10.1016/j.jssc.2019.06.040

DO - 10.1016/j.jssc.2019.06.040

M3 - Article

AN - SCOPUS:85068368981

SN - 0022-4596

VL - 277

SP - 422

EP - 426

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

ER -

Nanoscale interlayer defects in iron arsenides

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this