TY  - JOUR
AU  - Liu, Panpan
AU  - Klemm, Mason L.
AU  - Tian, Long
AU  - Lu, Xingye
AU  - Song, Yu
AU  - Tam, David W.
AU  - Schmalzl, Karin
AU  - Park, J. T.
AU  - Li, Yu
AU  - Tan, Guotai
AU  - Su, Yixi
AU  - Bourdarot, Frédéric
AU  - Zhao, Yang
AU  - Lynn, Jeffery W.
AU  - Birgeneau, Robert J.
AU  - Dai, Pengcheng
TI  - In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe2As2
JO  - Nature Communications
VL  - 11
IS  - 1
SN  - 2041-1723
CY  - [London]
PB  - Nature Publishing Group UK
M1  - FZJ-2020-04705
SP  - 5728
PY  - 2020
AB  - 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
LB  - PUB:(DE-HGF)16
C6  - 33184278
UR  - <Go to ISI:>//WOS:000593979700001
DO  - DOI:10.1038/s41467-020-19421-5
UR  - https://juser.fz-juelich.de/record/888131
ER  -