Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe2As2
Journal Article
·
· Nature Communications
- Univ. of California, Davis, CA (United States). Dept. of Physics
- Technische Univ. Dresden (Germany). Inst. for Solid State Physics
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
- mes Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
- 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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