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Title: In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe2As2

Abstract

A small in-plane external uniaxial pressure has been widely used as an effective method to acquire single domain iron pnictide BaFe2As2, which exhibits twin-domains without uniaxial strain below the tetragonal-to-orthorhombic structural (nematic) transition temperature Ts. Although it is generally assumed that such a pressure will not affect the intrinsic electronic/magnetic properties of the system, it is known to enhance the antiferromagnetic (AF) ordering temperature TN ( < Ts) and create in-plane resistivity anisotropy above Ts. Here we use neutron polarization analysis to show that such a strain on BaFe2As2 also induces a static or quasi-static out-of-plane (c-axis) AF order and its associated critical spin fluctuations near TN/Ts. Therefore, uniaxial pressure necessary to detwin single crystals of BaFe2As2 actually rotates the easy axis of the collinear AF order near TN/Ts, and such effects due to spin-orbit coupling must be taken into account to unveil the intrinsic electronic/magnetic properties of the system.

Authors:
 [1];  [2];  [1]; ORCiD logo [1];  [3]; ORCiD logo [2];  [4]; ORCiD logo [5];  [2]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [8];  [9]; ORCiD logo [2]
  1. Beijing Normal Univ. (China). Center for Advanced Quantum Studies
  2. Rice Univ., Houston, TX (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Forchungszentrum Juelich GmbH, Grenoble (France). Juelich Center for Neutron Science at ILL
  5. Technische Univ. Munchen, Garching (Germany). Heinz Maeir-Leibnitz Zentrum (MLZ)
  6. Forchungszentrum Juelich GmbH, Garching (Germany). Juelich Center for Neutron Science JCNS at MLZ
  7. Univ. Grenoble Alpes, Grenoble (France)
  8. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
  9. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); Robert A. Welch Foundation
OSTI Identifier:
1763679
Grant/Contract Number:  
AC02-05CH11231; 11922402; 11734002; C-1839; DMR-1700081
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Magnetic properties and materials; superconducting properties and materials

Citation Formats

Liu, Panpan, Klemm, Mason L., Tian, Long, Lu, Xingye, Song, Yu, Tam, David W., Schmalzl, Karin, Park, J. T., Li, Yu, Tan, Guotai, Su, Yixi, Bourdarot, Frédéric, Zhao, Yang, Lynn, Jeffery W., Birgeneau, Robert J., and Dai, Pengcheng. In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe2As2. United States: N. p., 2020. Web. https://doi.org/10.1038/s41467-020-19421-5.
Liu, Panpan, Klemm, Mason L., Tian, Long, Lu, Xingye, Song, Yu, Tam, David W., Schmalzl, Karin, Park, J. T., Li, Yu, Tan, Guotai, Su, Yixi, Bourdarot, Frédéric, Zhao, Yang, Lynn, Jeffery W., Birgeneau, Robert J., & Dai, Pengcheng. In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe2As2. United States. https://doi.org/10.1038/s41467-020-19421-5
Liu, Panpan, Klemm, Mason L., Tian, Long, Lu, Xingye, Song, Yu, Tam, David W., Schmalzl, Karin, Park, J. T., Li, Yu, Tan, Guotai, Su, Yixi, Bourdarot, Frédéric, Zhao, Yang, Lynn, Jeffery W., Birgeneau, Robert J., and Dai, Pengcheng. Thu . "In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe2As2". United States. https://doi.org/10.1038/s41467-020-19421-5. https://www.osti.gov/servlets/purl/1763679.
@article{osti_1763679,
title = {In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe2As2},
author = {Liu, Panpan and Klemm, Mason L. and Tian, Long and Lu, Xingye and Song, Yu and Tam, David W. and Schmalzl, Karin and Park, J. T. and Li, Yu and Tan, Guotai and Su, Yixi and Bourdarot, Frédéric and Zhao, Yang and Lynn, Jeffery W. and Birgeneau, Robert J. and Dai, Pengcheng},
abstractNote = {A small in-plane external uniaxial pressure has been widely used as an effective method to acquire single domain iron pnictide BaFe2As2, which exhibits twin-domains without uniaxial strain below the tetragonal-to-orthorhombic structural (nematic) transition temperature Ts. Although it is generally assumed that such a pressure will not affect the intrinsic electronic/magnetic properties of the system, it is known to enhance the antiferromagnetic (AF) ordering temperature TN ( < Ts) and create in-plane resistivity anisotropy above Ts. Here we use neutron polarization analysis to show that such a strain on BaFe2As2 also induces a static or quasi-static out-of-plane (c-axis) AF order and its associated critical spin fluctuations near TN/Ts. Therefore, uniaxial pressure necessary to detwin single crystals of BaFe2As2 actually rotates the easy axis of the collinear AF order near TN/Ts, and such effects due to spin-orbit coupling must be taken into account to unveil the intrinsic electronic/magnetic properties of the system.},
doi = {10.1038/s41467-020-19421-5},
journal = {Nature Communications},
number = 1,
volume = 11,
place = {United States},
year = {2020},
month = {11}
}

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