Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe2As2
| Autor: | Makariy A. Tanatar, Rajib Sarkar, Nicholas Curro, Rafael M. Fernandes, T. Kissikov, P. C. Canfield, S.L. Bud'ko, Erik Timmons, Ruslan Prozorov, Matthew Lawson, B. T. Bush |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Science
FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Spin structure 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Condensed Matter - Strongly Correlated Electrons Paramagnetism Tetragonal crystal system Liquid crystal 0103 physical sciences lcsh:Science 010306 general physics Anisotropy Fluctuation spectrum Phase diagram Physics Multidisciplinary Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Spin polarization General Chemistry 021001 nanoscience & nanotechnology Condensed Matter::Soft Condensed Matter lcsh:Q Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
| Zdroj: | Nature Communications, Vol 9, Iss 1, Pp 1-6 (2018) Nature communications, vol 9, iss 1 Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | The iron-based high temperature superconductors exhibit a rich phase diagram reflecting a complex interplay between spin, lattice, and orbital degrees of freedom [1-4]. The nematic state observed in many of 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 [5-7]. A more subtle and much 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. Here, we present a new technique enabling nuclear magnetic resonance under precise tunable strain control, which reveals that upon application of a tetragonal symmetry-breaking strain field, the magnetic fluctuation spectrum in the paramagnetic phase of BaFe$_{2}$As$_{2}$ also acquires an anisotropic response in spin-space. Our results unveil a hitherto uncharted internal spin structure of the nematic order parameter, indicating that similar to liquid crystals, electronic nematic materials may offer a novel route to magneto-mechanical control. Comment: 11 pages, 5 figures |
| Databáze: | OpenAIRE |
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