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

被引：47
作者：
Kissikov, T. [1 ]
Sarkar, R. [2 ]
Lawson, M. [1 ]
Bush, B. T. [1 ]
Timmons, E. I. [3 ,4 ]
Tanatar, M. A. [3 ,4 ]
Prozorov, R. [3 ,4 ]
Bud'ko, S. L. [3 ,4 ]
Canfield, P. C. [3 ,4 ]
Fernandes, R. M. [5 ]
Curro, N. J. [1 ]
机构：
[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
[2] Tech Univ Dresden, Inst Solid State Phys, D-01069 Dresden, Germany
[3] US DOE, Ames Lab, Ames, IA 50011 USA
[4] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[5] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA
来源：
NATURE COMMUNICATIONS | 2018年 / 9卷
关键词：
D O I：
10.1038/s41467-018-03377-8
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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. 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.
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页数：6
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