skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

This content will become publicly available on July 3, 2020

Title: Room temperature local nematicity in FeSe superconductor

Abstract

We report pair distribution function measurements of the iron-based superconductor FeSe above and below the structural transition temperature. Structural analysis reveals a local orthorhombic distortion with a correlation length of about 4 nm at temperatures where an average tetragonal symmetry is observed. The analysis further demonstrates that the local distortion is larger than the global distortion at temperatures where the average observed symmetry is orthorhombic. Furthermore, our results suggest that the low-temperature macroscopic nematic state in FeSe forms from an imperfect ordering of orbital-degeneracy-lifted nematic fluctuations which persist up to at least 300 K.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [1];  [2];  [1];  [4]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Photon Sciences Division
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; 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) (SC-22)
OSTI Identifier:
1529884
Report Number(s):
BNL-211804-2019-JAAM
Journal ID: ISSN 2469-9950
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 2; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Koch, R. J., Konstantinova, T., Abeykoon, M., Wang, A., Petrovic, C., Zhu, Y., Bozin, E. S., and Billinge, S. J. L. Room temperature local nematicity in FeSe superconductor. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.020501.
Koch, R. J., Konstantinova, T., Abeykoon, M., Wang, A., Petrovic, C., Zhu, Y., Bozin, E. S., & Billinge, S. J. L. Room temperature local nematicity in FeSe superconductor. United States. doi:10.1103/PhysRevB.100.020501.
Koch, R. J., Konstantinova, T., Abeykoon, M., Wang, A., Petrovic, C., Zhu, Y., Bozin, E. S., and Billinge, S. J. L. Wed . "Room temperature local nematicity in FeSe superconductor". United States. doi:10.1103/PhysRevB.100.020501.
@article{osti_1529884,
title = {Room temperature local nematicity in FeSe superconductor},
author = {Koch, R. J. and Konstantinova, T. and Abeykoon, M. and Wang, A. and Petrovic, C. and Zhu, Y. and Bozin, E. S. and Billinge, S. J. L.},
abstractNote = {We report pair distribution function measurements of the iron-based superconductor FeSe above and below the structural transition temperature. Structural analysis reveals a local orthorhombic distortion with a correlation length of about 4 nm at temperatures where an average tetragonal symmetry is observed. The analysis further demonstrates that the local distortion is larger than the global distortion at temperatures where the average observed symmetry is orthorhombic. Furthermore, our results suggest that the low-temperature macroscopic nematic state in FeSe forms from an imperfect ordering of orbital-degeneracy-lifted nematic fluctuations which persist up to at least 300 K.},
doi = {10.1103/PhysRevB.100.020501},
journal = {Physical Review B},
number = 2,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on July 3, 2020
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Two-dimensional detector software: From real detector to idealised image or two-theta scan
journal, January 1996

  • Hammersley, A. P.; Svensson, S. O.; Hanfland, M.
  • High Pressure Research, Vol. 14, Issue 4-6, p. 235-248
  • DOI: 10.1080/08957959608201408