Speaker

Dr. Tsutomu Momoi / RIKEN

Title

Dynamics of spin nematics in a magnetic field: A comparison with canted antiferromagnets

Abstract

The NMR relaxation rate is one of the promising probes for detecting spin-nematic states. In one-dimensional spin-nematic Tomonaga-Luttinger liquids, the temperature dependence of the relaxation shows a slow decay compared with the conventional one-dimensional antiferromagnets [1]. However, in the case of three-dimensional spin-nematic ordered phases, different methods show different results [2,3], and the understanding still needs to be settled. We have reanalyzed the dynamical quantities of the spin-nematic phase using the interacting boson theory to resolve this confusion. In a supplement to a previous paper [4], we obtained, using boson theory, the dynamical quantities of the spin-gap phase close to the spin-nematic phase. Extending this method, we newly studied dynamical quantities inside the spin-nematic phase by considering boson interactions and bi-magnon condensation.

[1] M. Sato, T. Momoi, and A. Furusaki, Phys. Rev. B 79, 060406(R) (2009).

[2] R. Shindou, S. Yunoki, and T. Momoi, Phys. Rev. B. 87, 054429 (2013).

[3] A. Smerald and N. Shannon, Phys. Rev. B 93, 184419 (2016).

[4] S. Imajo et al., Phys. Rev. Lett. 129, 147201 (2022).

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