Quantum fluctuations of chirality in one-dimensional spin-1/2 multiferroics: Gapless dielectric response from phasons and chiral solitons

Shunsuke Furukawa, Masahiro Sato, Yasuhiro Saiga, Shigeki Onoda

研究成果: Article

25 引用 (Scopus)

抜粋

We present a quantum theory for one-dimensional spin-1/2 multiferroics, where the vector spin chirality couples with the electric polarization. Based on exact diagonalization and bosonization, it is shown that quantum fluctuations appreciably reduce the chiral ordering amplitude and the associated ferroelectric polarization. This yields nearly collinear spin correlations in short-range scales, in qualitative agreement with recent neutron scattering experiments. There appear gapless chirality excitations described by phasons and new solitons, which can be experimentally verified from the low-energy dielectric response.

元の言語English
記事番号123712
ジャーナルJournal of the Physical Society of Japan
77
発行部数12
DOI
出版物ステータスPublished - 2008 12 1
外部発表Yes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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