Rb-NMR study of the quasi-one-dimensional competing spin-chain compound Rb2Cu2Mo3O12

Kazuki Matsui, Ayato Yagi, Yukihiro Hoshino, Sochiro Atarashi, Masashi Hase, Takahiko Sasaki, Takayuki Goto

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11 Citations (Scopus)


A Rb-NMR study has been performed on the quasi-one-dimensional competing spin chain Rb2Cu2Mo3O12 with ferromagnetic and antiferromagnetic exchange interactions on nearest-neighboring and next-nearest neighboring spins, respectively. The system changes from a gapped ground state at zero field to a gapless state at HC≃2T, where the existence of magnetic order below 1 K was demonstrated by a broadening of the NMR spectrum, associated with a critical divergence of 1/T1. In the higher-temperature region, T1-1 showed a power-law-type temperature dependence, from which the field dependence of the Luttinger parameter K was obtained and compared with theoretical calculations based on the spin nematic Tomonaga-Luttinger liquid (TLL) state.

Original languageEnglish
Article number220402
JournalPhysical Review B
Issue number22
Publication statusPublished - 2017 Dec 8


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