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Title: Frustrated magnetism from local moments in FeSe

Abstract

We investigate properties of a spin-1 Heisenberg model with extended and biquadratic interactions, which captures crucial aspects of the low energy physics in FeSe. While we show that the model exhibits a rich phase diagram with four different magnetic ordering tendencies, we identify a parameter regime with strong competition between Néel, staggered dimer, and stripelike magnetic fluctuations, accounting for the physical properties of FeSe. We evaluate the spin and Raman responses using exact diagonalization. Through comparison with experiments we find enhanced magnetic frustration between Néel and collinear stripe ordering tendencies, which increases with increasing temperature. The explanation of these spectral behaviors with this frustrated spin model supports the idea of local spin interactions in FeSe.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6]
+ Show Author Affiliations
  1. Stanford Univ., CA (United States). Dept. of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Dept. of Physics and Astrophysics
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Dept. of Physics and Astrophysics; Stanford Univ., CA (United States). Dept. of Applied Physics; Harvard Univ., Cambridge, MA (United States). Dept. of Physics
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Dept. of Physics and Astrophysics; Univ. of North Dakota, Grand Forks, ND (United States). Dept. of Physics and Astrophysics
  4. Bayerische Akademie der Wissenschaften, Garching (Germany). Walther Meissner Inst.; Technische Univ. Munchen, Garching (Germany). Fakultat fur Physik
  5. Bayerische Akademie der Wissenschaften, Garching (Germany). Walther Meissner Inst.
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States). Dept. of Physics and Astrophysics
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1543136
DOE Contract Number:  
AC02-76SF00515; AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 12; Journal ID: ISSN 2469-9950
Country of Publication:
United States
Language:
English

Citation Formats

Ruiz, Harrison, Wang, Yao, Moritz, Brian, Baum, Andreas, Hackl, Rudi, and Devereaux, Thomas P. Frustrated magnetism from local moments in FeSe. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.125130.
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Ruiz, Harrison, Wang, Yao, Moritz, Brian, Baum, Andreas, Hackl, Rudi, & Devereaux, Thomas P. Frustrated magnetism from local moments in FeSe. United States. doi:10.1103/PhysRevB.99.125130.
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Ruiz, Harrison, Wang, Yao, Moritz, Brian, Baum, Andreas, Hackl, Rudi, and Devereaux, Thomas P. Fri . "Frustrated magnetism from local moments in FeSe". United States. doi:10.1103/PhysRevB.99.125130.
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@article{osti_1543136,
title = {Frustrated magnetism from local moments in FeSe},
author = {Ruiz, Harrison and Wang, Yao and Moritz, Brian and Baum, Andreas and Hackl, Rudi and Devereaux, Thomas P.},
abstractNote = {We investigate properties of a spin-1 Heisenberg model with extended and biquadratic interactions, which captures crucial aspects of the low energy physics in FeSe. While we show that the model exhibits a rich phase diagram with four different magnetic ordering tendencies, we identify a parameter regime with strong competition between Néel, staggered dimer, and stripelike magnetic fluctuations, accounting for the physical properties of FeSe. We evaluate the spin and Raman responses using exact diagonalization. Through comparison with experiments we find enhanced magnetic frustration between Néel and collinear stripe ordering tendencies, which increases with increasing temperature. The explanation of these spectral behaviors with this frustrated spin model supports the idea of local spin interactions in FeSe.},
doi = {10.1103/PhysRevB.99.125130},
journal = {Physical Review B},
issn = {2469-9950},
number = 12,
volume = 99,
place = {United States},
year = {2019},
month = {3}
}
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Journal Article:
DOI:  10.1103/PhysRevB.99.125130
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