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Title: Local Orthorhombicity in the Magnetic C 4 Phase of the Hole-Doped Iron-Arsenide Superconductor Sr 1 - x Na x Fe 2 As 2

We report on temperature-dependent pair distribution function measurements of Sr 1-xNa xFe 2As 2, an iron-based superconductor system that contains a magnetic phase with reentrant tetragonal symmetry, known as the magnetic C 4 phase. Quantitative refinements indicate that the instantaneous local structure in the C 4 phase comprises fluctuating orthorhombic regions with a length scale of similar to 2 nm, despite the tetragonal symmetry of the average static structure. Additionally, local orthorhombic fluctuations exist on a similar length scale at temperatures well into the paramagnetic tetragonal phase. Furthermore, these results highlight the exceptionally large nematic susceptibility of iron-based superconductors and have significant implications for the magnetic C 4 phase and the neighboring C 2 and superconducting phases.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [8] ;  [8] ;  [9] ;  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California-San Diego, La Jolla, CA (United States)
  5. Columbia Univ., New York, NY (United States)
  6. Renmin Univ. of China, Beijing (China); Shanghai Jiao Tong Univ., Shanghai (China)
  7. Rice Univ., Houston, TX (United States)
  8. Argonne National Lab. (ANL), Argonne, IL (United States)
  9. Argonne National Lab. (ANL), Argonne, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357; AC02-05CH11231; SC0018197; SC0012704; AC03-76SF008
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1411051
Alternate Identifier(s):
OSTI ID: 1405561; OSTI ID: 1466707

Frandsen, Benjamin A., Taddei, Keith M., Yi, Ming, Frano, Alex, Guguchia, Zurab, Yu, Rong, Si, Qimiao, Bugaris, Daniel E., Stadel, Ryan, Osborn, Raymond, Rosenkranz, Stephan, Chmaissem, Omar, and Birgeneau, Robert J.. Local Orthorhombicity in the Magnetic C4 Phase of the Hole-Doped Iron-Arsenide Superconductor Sr1-xNaxFe2As2. United States: N. p., Web. doi:10.1103/PhysRevLett.119.187001.
Frandsen, Benjamin A., Taddei, Keith M., Yi, Ming, Frano, Alex, Guguchia, Zurab, Yu, Rong, Si, Qimiao, Bugaris, Daniel E., Stadel, Ryan, Osborn, Raymond, Rosenkranz, Stephan, Chmaissem, Omar, & Birgeneau, Robert J.. Local Orthorhombicity in the Magnetic C4 Phase of the Hole-Doped Iron-Arsenide Superconductor Sr1-xNaxFe2As2. United States. doi:10.1103/PhysRevLett.119.187001.
Frandsen, Benjamin A., Taddei, Keith M., Yi, Ming, Frano, Alex, Guguchia, Zurab, Yu, Rong, Si, Qimiao, Bugaris, Daniel E., Stadel, Ryan, Osborn, Raymond, Rosenkranz, Stephan, Chmaissem, Omar, and Birgeneau, Robert J.. 2017. "Local Orthorhombicity in the Magnetic C4 Phase of the Hole-Doped Iron-Arsenide Superconductor Sr1-xNaxFe2As2". United States. doi:10.1103/PhysRevLett.119.187001. https://www.osti.gov/servlets/purl/1411051.
@article{osti_1411051,
title = {Local Orthorhombicity in the Magnetic C4 Phase of the Hole-Doped Iron-Arsenide Superconductor Sr1-xNaxFe2As2},
author = {Frandsen, Benjamin A. and Taddei, Keith M. and Yi, Ming and Frano, Alex and Guguchia, Zurab and Yu, Rong and Si, Qimiao and Bugaris, Daniel E. and Stadel, Ryan and Osborn, Raymond and Rosenkranz, Stephan and Chmaissem, Omar and Birgeneau, Robert J.},
abstractNote = {We report on temperature-dependent pair distribution function measurements of Sr1-xNaxFe2As2, an iron-based superconductor system that contains a magnetic phase with reentrant tetragonal symmetry, known as the magnetic C4 phase. Quantitative refinements indicate that the instantaneous local structure in the C4 phase comprises fluctuating orthorhombic regions with a length scale of similar to 2 nm, despite the tetragonal symmetry of the average static structure. Additionally, local orthorhombic fluctuations exist on a similar length scale at temperatures well into the paramagnetic tetragonal phase. Furthermore, these results highlight the exceptionally large nematic susceptibility of iron-based superconductors and have significant implications for the magnetic C4 phase and the neighboring C2 and superconducting phases.},
doi = {10.1103/PhysRevLett.119.187001},
journal = {Physical Review Letters},
number = 18,
volume = 119,
place = {United States},
year = {2017},
month = {10}
}

Works referenced in this record:

Magnetic pair distribution function analysis of local magnetic correlations
journal, December 2013
  • Frandsen, Benjamin A.; Yang, Xiaohao; Billinge, Simon J. L.
  • Acta Crystallographica Section A Foundations and Advances, Vol. 70, Issue 1, p. 3-11
  • DOI: 10.1107/S2053273313033081

Magnetic structure determination from the magnetic pair distribution function (mPDF): ground state of MnO
journal, April 2015
  • Frandsen, Benjamin A.; Billinge, Simon J. L.
  • Acta Crystallographica Section A Foundations and Advances, Vol. 71, Issue 3, p. 325-334
  • DOI: 10.1107/S205327331500306X