Quantum Fluctuations of Chirality in One-Dimensional Spin-1/2 Multiferroics : Gapless Dielectric Response from Phasons and Chiral Solitons(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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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.
- 社団法人日本物理学会の論文
- 2008-12-15
著者
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Furukawa Shunsuke
Condensed Matter Theory Laboratory Riken
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Onoda Shigeki
Condensed Matter Theory Laboratory Riken
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Saiga Yasuhiro
Department Of Physics Nagoya University
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Saiga Yasuhiro
Center For Educational Assistance Shibaura Institute Of Technology
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SATO Masahiro
Condensed Matter Theory Laboratory, RIKEN
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Sato Masahiro
Condensed Matter Theory Laboratory Riken
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Onoda Shigeki
Riken Saitama Jpn
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Saiga Yasuhiro
Department of Physics, Nagoya University
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