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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. As a result, 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]
  1. Stanford Univ., Stanford, CA (United States); Stanford Univ., Menlo Park, CA (United States)
  2. Stanford Univ., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States); Harvard Univ., Cambridge, MA (United States)
  3. Stanford Univ., Menlo Park, CA (United States); Univ. of North Dakota, Grand Forks, ND (United States)
  4. Walther Meissner Institut, Garching (Germany); Technische Univ. Munchen, Garching (Germany)
  5. Walther Meissner Institut, Garching (Germany)
  6. Stanford Univ., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1526705
Alternate Identifier(s):
OSTI ID: 1501698
Grant/Contract Number:  
AC02-76SF00515; AC02-05CH11231; HA2071/12-1
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 12; 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; 36 MATERIALS SCIENCE

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.
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.
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. https://www.osti.gov/servlets/purl/1526705.
@article{osti_1526705,
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. As a result, 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},
number = 12,
volume = 99,
place = {United States},
year = {2019},
month = {3}
}

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