Quantum Fluctuations of Chirality in One-Dimensional Spin-1/2 Multiferroics: Gapless Dielectric Response from Phasons and Chiral Solitons

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dc.creatorFurukawa, Shunsuke
dc.creatorSato, Masahiro
dc.creatorSaiga, Yasuhiro
dc.creatorOnoda, Shigeki
dc.date2008-02-22
dc.date2008-11-06
dc.date.accessioned2026-07-07T12:10:28Z
dc.date.available2026-07-07T12:10:28Z
dc.descriptionWe 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.
dc.description5 pages, 6 figures. v3: The analysis of the chirality dynamics at q=pi added. v4: Final version. To be published in J. Phys. Soc. Jpn
dc.identifierhttps://arxiv.org/abs/0802.3256
dc.identifierhttp://arxiv.org/abs/0802.3256
dc.identifierJ. Phys. Soc. Jpn. 77, 123712 (2008)
dc.identifierdoi:10.1143/JPSJ.77.123712
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/209943
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleQuantum Fluctuations of Chirality in One-Dimensional Spin-1/2 Multiferroics: Gapless Dielectric Response from Phasons and Chiral Solitons
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