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Title: Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe

Abstract

A hallmark of the iron-based superconductors is the strong coupling between magnetic, structural and electronic degrees of freedom. However, a universal picture of the normal state properties of these compounds has been confounded by recent investigations of FeSe where the nematic (structural) and magnetic transitions appear to be decoupled. Here, using synchrotron-based high-energy x-ray diffraction and time-domain Mossbauer spectroscopy, we show that nematicity and magnetism in FeSe under applied pressure are indeed strongly coupled. Distinct structural and magnetic transitions are observed for pressures between 1.0 and 1.7 GPa and merge into a single first-order transition for pressures ≳1.7 GPa, reminiscent of what has been found for the evolution of these transitions in the prototypical system Ba(Fe1–xCox)2As2. Lastly, our results are consistent with a spin-driven mechanism for nematic order in FeSe and provide an important step towards a universal description of the normal state properties of the iron-based superconductors.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Carnegie Inst. of Washington, Argonne, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1337680
Report Number(s):
IS-J-9041
Journal ID: ISSN 2041-1723; ncomms12728
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Kothapalli, K., Bohmer, A. E., Jayasekara, W. T., Ueland, B. G., Das, P., Sapkota, A., Taufour, V., Xiao, Y., Alp, E., Bud’ko, S. L., Canfield, P. C., Kreyssig, A., and Goldman, A. I. Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe. United States: N. p., 2016. Web. doi:10.1038/ncomms12728.
Kothapalli, K., Bohmer, A. E., Jayasekara, W. T., Ueland, B. G., Das, P., Sapkota, A., Taufour, V., Xiao, Y., Alp, E., Bud’ko, S. L., Canfield, P. C., Kreyssig, A., & Goldman, A. I. Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe. United States. https://doi.org/10.1038/ncomms12728
Kothapalli, K., Bohmer, A. E., Jayasekara, W. T., Ueland, B. G., Das, P., Sapkota, A., Taufour, V., Xiao, Y., Alp, E., Bud’ko, S. L., Canfield, P. C., Kreyssig, A., and Goldman, A. I. Thu . "Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe". United States. https://doi.org/10.1038/ncomms12728. https://www.osti.gov/servlets/purl/1337680.
@article{osti_1337680,
title = {Strong cooperative coupling of pressure-induced magnetic order and nematicity in FeSe},
author = {Kothapalli, K. and Bohmer, A. E. and Jayasekara, W. T. and Ueland, B. G. and Das, P. and Sapkota, A. and Taufour, V. and Xiao, Y. and Alp, E. and Bud’ko, S. L. and Canfield, P. C. and Kreyssig, A. and Goldman, A. I.},
abstractNote = {A hallmark of the iron-based superconductors is the strong coupling between magnetic, structural and electronic degrees of freedom. However, a universal picture of the normal state properties of these compounds has been confounded by recent investigations of FeSe where the nematic (structural) and magnetic transitions appear to be decoupled. Here, using synchrotron-based high-energy x-ray diffraction and time-domain Mossbauer spectroscopy, we show that nematicity and magnetism in FeSe under applied pressure are indeed strongly coupled. Distinct structural and magnetic transitions are observed for pressures between 1.0 and 1.7 GPa and merge into a single first-order transition for pressures ≳1.7 GPa, reminiscent of what has been found for the evolution of these transitions in the prototypical system Ba(Fe1–xCox)2As2. Lastly, our results are consistent with a spin-driven mechanism for nematic order in FeSe and provide an important step towards a universal description of the normal state properties of the iron-based superconductors.},
doi = {10.1038/ncomms12728},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}

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