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Spin Nematic Liquid Crystal and Scalar Spin Chirality in Tetragonal Lattice YbMnBi2

Yaofeng Xie, Sijie Xu, Yu Pan, Taekoo Oh, Tingjun Zhang, Masaaki Matsuda, Zhaoyu Liu, Zehao Wang, Yiheng Wang, Siyu Pan, Avishek Maity, Sylwia Pawledzio, Xiaoping Wang, Songxue Chi, Feng Ye, Yiqing Hao, Huibo Cao, Barry L. Winn, Melissa K. Graves-Brook, Shuai Wu, Fan Li, Xiaoyuan Zhou, Claudia Felser, Naoto Nagaosa, and Pengcheng Dai

Phys. Rev. X 16, 041001 (2026) - Published 1 October, 2026

Neutron scattering experiments on YbMnBi2 reveal that a dynamic spin nematic state coupled to magnetic fields generates scalar spin chirality, driving anomalous Hall and Nernst effects in the paramagnetic phase.

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