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Article
Distinct pressure evolution of coupled nematic and magnetic orders in FeSe
Ames Laboratory Accepted Manuscripts
  • Anna E. Böhmer, Ames Laboratory and Karlsruhe Institute of Technology
  • Karunakar Kothapalli, Iowa State University, Ames Laboratory, and King University
  • Wageesha T. Jayasekara, Iowa State University and Ames Laboratory
  • John M. Wilde, Iowa State University and Ames Laboratory
  • Bing Li, Iowa State University and Ames Laboratory
  • Aashish Sapkota, Iowa State University and Ames Laboratory
  • Benjamin G. Ueland, Iowa State University and Ames Laboratory
  • Pinaki Das, Iowa State University and Ames Laboratory
  • Yumin Xiao, Argonne National Laboratory
  • Wenli Bi, Argonne National Laboratory and University of Illinois at Urbana-Champaign
  • Jiyong Zhao, Argonne National Laboratory
  • E. Ercan Alp, Argonne National Laboratory
  • Sergey L. Bud’ko, Iowa State University and Ames Laboratory
  • Paul C. Canfield, Iowa State University and Ames Laboratory
  • Alan I. Goldman, Iowa State University and Ames Laboratory
  • Andreas Kreyssig, Iowa State University and Ames Laboratory
Publication Date
8-1-2019
Department
Ames Laboratory; Physics and Astronomy
OSTI ID+
1560622
Report Number
IS-J 10025
DOI
10.1103/PhysRevB.100.064515
Journal Title
Physical Review B
Abstract

We present a microscopic study of nematicity and magnetism in FeSe over a wide temperature and pressure range using high-energy x-ray diffraction and time-domain Mössbauer spectroscopy. The low-temperature magnetic hyperfine field increases monotonically up to ∼ 6 GPa. The orthorhombic distortion initially decreases under increasing pressure but is stabilized at intermediate pressures by cooperative coupling to the pressure-induced magnetic order. Close to the reported maximum of the superconducting critical temperature at p = 6.8 GPa , the orthorhombic distortion suddenly disappears and a new tetragonal magnetic phase occurs. The pressure and temperature evolution of the structural and magnetic order parameters suggests that they have distinct origins.

DOE Contract Number(s)
FG02-94ER14466; AC02-07CH11358; AC02-06CH11357; EAR 11-57758; EAR-1128799; EAR 1606856
Language
en
Publisher
Iowa State University Digital Repository, Ames IA (United States)
Citation Information
Anna E. Böhmer, Karunakar Kothapalli, Wageesha T. Jayasekara, John M. Wilde, et al.. "Distinct pressure evolution of coupled nematic and magnetic orders in FeSe" Vol. 100 Iss. 6 (2019) p. 064515
Available at: http://works.bepress.com/ai-goldman/44/