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Tilted and Twisted Magnetic Moments in the Kitaev Magnet α-RuCl3 认领 引用
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作者 Xiao Wang Fengfeng Zhu +8 位作者 Markus Braden Karin Schmalzl Wolfgang Schmidt Martin Meven Erxi Feng Yinghao Zhu Alexandre Bertin Paul Steffens Yixi Su 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第5期161-173,共13页
The layered honeycomb magnetα-RuCl3has attracted intense scrutiny as a prime candidate for realizing the Kitaev quantum spin liquid,yet a consensus on its microscopic Hamiltonian remains elusive due to the materia... The layered honeycomb magnetα-RuCl3has attracted intense scrutiny as a prime candidate for realizing the Kitaev quantum spin liquid,yet a consensus on its microscopic Hamiltonian remains elusive due to the material's extreme sensitivity to structural details.Here,we report a comprehensive reexamination of the low-temperature crystallographic and magnetic structures of high-qualityα-RuCl3single crystals using unpolarized and polarized neutron diffraction.We confirm a sharp,first-order structural phase transition to the rhombohedral R3 space group with a pronounced thermal hysteresis.Crucially,using both spherical and longitudinal neutron polarization analysis,we determine the 3D orientation of the ordered magnetic moment without the ambiguity typically arising from domain distributions.We find that the Ru3+magnetic moments in the zigzag phase are tilted by 15.7°out of the hexagonal plane and,remarkably,exhibit an additional in-plane twist of-13.8°.This“tilted and twistedžgeometry differentiates the ground state from the previously reported models based on unpolarized neutron diffraction or resonant elastic X-ray scattering(REXS)analysis. 展开更多
关键词 kitaev quantum spin liquidyet tilted magnetic moments Kitaev magnet unpolarized polarized neutron diffractionwe microscopic hamiltonian twisted magnetic moments layered honeycomb crystallographic magnetic structures
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