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arXiv 2209.10239cond-mat.str-el
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来自碎片化阻挫磁体的中子散射

Neutron scattering from fragmented frustrated magnets

Institut Néel, CNRS & Univ. Grenoble Alpes(内尔研究所,法国国家科学研究中心与格勒诺布尔阿尔卑斯大学);ENS de Lyon, CNRS, Laboratoire de Physique(里昂高等师范学院,法国国家科学研究中心,物理实验室)

F. Museur, E. Lhotel, P. C. W. Holdsworth

AI总结:

本研究采用碎片化描述分析kagomé冰与自旋冰的中子散射强度,揭示量子涨落局限于横向碎片并驱动双q有序结构,提出横向碎片布拉格峰强度降低可作为量子涨落诊断工具,且已有量子蒙特卡洛数据支持该方案。

摘要:

我们采用碎片化描述来分析kagomé冰(笼目冰)和自旋冰系统的计算中子散射强度。纵向、横向和谐波碎片对中子散射强度有各自独立的贡献。我们使用该框架分析kagomé冰拓扑约束相和自旋冰单极子晶体相中由量子涨落引发的有序行为。此处,量子涨落被限制在横向碎片中,它们会驱动系统形成双q结构,其中纵向与横向碎片具有不同的有序波矢。与已知的经典极限相比,横向碎片的布拉格峰强度降低可作为量子涨落的诊断工具。已发表的[111]场下自旋冰的量子蒙特卡洛数据与所提出的方案一致。

英文摘要:

The fragmentation description is used to analyse calculated neutron scattering intensities from kagomé ice and spin ice systems. The longitudinal, transverse and harmonic fragments produce independent contributions to the neutron scattering intensity. This framework is used to analyse the ordering due to quantum fluctuations in the topologically constrained phase of kagomé ice and the monopole crystal phase of spin ice. Here, quantum fluctuations are restricted to the transverse fragment and they drive the system into a double-$q$ structure in which longitudinal and transverse fragments have a different ordering wave vector. The intensity reduction of the Bragg peaks for the transverse fragments, compared with known classical limits can be used as a diagnostic tool for quantum fluctuations. Published quantum Monte Carlo data for spin ice in a $[111]$ field are consistent with the proposed protocol.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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