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arXiv · 1703.03881

Spin-orbit interaction driven dimerization in one dimensional frustrated magnets

Shang-Shun Zhang·Nitin Kaushal·Elbio Dagotto·Cristian D. Batista
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Abstract

We study the effect of spin-orbit interaction on one-dimensional U(1)-invariant frustrated magnets with dominant critical nematic fluctuations. The spin-orbit coupling explicitly breaks the U(1) symmetry of arbitrary global spin rotations about the high-symmetry axis down to $Z_2$ (invariance under a $π$-rotation). Given that the nematic order parameter is invariant under a $π$-rotation, it is relevant to ask if other discrete symmetries can be spontaneously broken. Here we demonstrate that the spin-orbit coupling induces a bond density wave that spontaneously breaks the translational symmetry and opens a gap in the excitation spectrum.

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Shang-Shun Zhang, Nitin Kaushal, Elbio Dagotto, Cristian D. Batista. 2017-11-13. Spin-orbit interaction driven dimerization in one dimensional frustrated magnets. https://doi.org/10.1103/physrevb.96.214408

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