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Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe2As2

Journal Article · · Nature Communications
 [1];  [2];  [1];  [1];  [3];  [3];  [3];  [3];  [4];  [5];  [1]
  1. Univ. of California, Davis, CA (United States). Dept. of Physics
  2. Technische Univ. Dresden (Germany). Inst. for Solid State Physics
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  4. mes Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  5. Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
The iron-based high temperature superconductors exhibit a rich phase diagram reflecting a complex interplay between spin, lattice, and orbital degrees of freedom. The nematic state observed in these compounds epitomizes this complexity, by entangling a real-space anisotropy in the spin fluctuation spectrum with ferro-orbital order and an orthorhombic lattice distortion. A subtle and less-explored facet of the interplay between these degrees of freedom arises from the sizable spin-orbit coupling present in these systems, which translates anisotropies in real space into anisotropies in spin space. We present nuclear magnetic resonance studies, which reveal that the magnetic fluctuation spectrum in the paramagnetic phase of BaFe2As2 acquires an anisotropic response in spin-space upon application of a tetragonal symmetry-breaking strain field. Lastly, our results unveil an internal spin structure of the nematic order parameter, indicating that electronic nematic materials may offer a route to magneto-mechanical control.
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Univ. of California, Davis, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-07CH11358; NA0002908; SC0012336
OSTI ID:
1433673
Alternate ID(s):
OSTI ID: 1755110
Report Number(s):
IS-J--9635; PII: 3377
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (14)

A tunable stress dilatometer and measurement of the thermal expansion under uniaxial stress of Mn3Sn journal December 2020
Probing the reconstructed Fermi surface of antiferromagnetic BaFe2As2 in one domain journal July 2019
Piezoelectric-based uniaxial pressure cell with integrated force and displacement sensors journal February 2019
Apparatus design for measuring of the strain dependence of the Seebeck coefficient of single crystals journal February 2020
The complex non-collinear magnetic orderings in Ba 2 YOsO 6 : a new approach to tuning spin-lattice interactions and controlling magnetic orderings in frustrated complex oxides journal August 2019
Intertwined spin-orbital coupled orders in the iron-based superconductors journal July 2019
Orbital loop currents in iron-based superconductors journal April 2018
Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between C 2 and C 4 magnetic phases journal July 2018
Symmetric and antisymmetric strain as continuous tuning parameters for electronic nematic order journal December 2018
Emergent Magnetic Degeneracy in Iron Pnictides due to the Interplay between Spin-Orbit Coupling and Quantum Fluctuations journal July 2018
Probing the reconstructed Fermi surface of antiferromagnetic $BaFe_{2}As_{2}$ in one domain text January 2019
Orbital loop currents in iron-based superconductors text January 2017
Piezoelectric-based uniaxial pressure cell with integrated force and displacement sensors preprint January 2018
Apparatus Design for Measuring of the Strain Dependence of the Seebeck Coefficient of Single Crystals text January 2021

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