Scholarlink

<p>The pursuit of quantum spin liquid (QSL) states in condensed matter physics has drawn attention to kagome antiferromagnets (AFM) where a two-dimensional corner-sharing network of triangles frustrates conventional magnetic orders. While quantum kagome AFMs based on Cu<sup>2+</sup> (3d<sup>9</sup>, s = ½) ions have been extensively studied, there is so far little work beyond copper-based systems. Here we present our bulk magnetization, specific heat and neutron scattering studies on single crystals of a new titanium fluorides Cs<sub>8</sub>RbK<sub>3</sub>Ti<sub>12</sub>F<sub>48</sub> where Ti<sup>3+</sup> (3d<sup>1</sup>, s = ½) ions form a modulated quantum kagome antiferromagnet that does not order magnetically down to 1.5 K. Our comprehensive map of the dynamic response function <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41467_2025_58971_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="71" /> </InlineMediaObject> <EquationSource Format="TEX">\({{{\boldsymbol{S}}}}({{{\bf{Q}}}},\hslash {{{\boldsymbol{\omega }}}})\)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="bold-italic">S</mi> <mrow> <mo>(</mo> <mrow> <mi mathvariant="bold">Q</mi> <mo>,</mo> <mi>ℏ</mi> <mi mathvariant="bold-italic">ω</mi> </mrow> <mo>)</mo> </mrow> </math></EquationSource> </InlineEquation> acquired at 1.5 K where the heat capacity is <i>T</i>-linear reveals a dispersive continuum emanating from soft lines that extend along (100). The data indicate fractionalized spinon-like excitations with quasi-one-dimensional dispersion within a quasi-two-dimensional spin system.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Gapless dispersive continuum in a modulated quantum kagome antiferromagnet

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月26日

查看全文
  • Asiri Thennakoon,
  • Ryouga Yokokura,
  • Yang Yang,
  • Ryoichi Kajimoto,
  • Mitsutaka Nakamura,
  • Masahiro Hayashi,
  • Chishiro Michioka,
  • Gia-Wei Chern,
  • Collin Broholm,
  • Hiroaki Ueda,
  • Seung-Hun Lee

摘要

The pursuit of quantum spin liquid (QSL) states in condensed matter physics has drawn attention to kagome antiferromagnets (AFM) where a two-dimensional corner-sharing network of triangles frustrates conventional magnetic orders. While quantum kagome AFMs based on Cu2+ (3d9, s = ½) ions have been extensively studied, there is so far little work beyond copper-based systems. Here we present our bulk magnetization, specific heat and neutron scattering studies on single crystals of a new titanium fluorides Cs8RbK3Ti12F48 where Ti3+ (3d1, s = ½) ions form a modulated quantum kagome antiferromagnet that does not order magnetically down to 1.5 K. Our comprehensive map of the dynamic response function \({{{\boldsymbol{S}}}}({{{\bf{Q}}}},\hslash {{{\boldsymbol{\omega }}}})\) S ( Q , ℏ ω ) acquired at 1.5 K where the heat capacity is T-linear reveals a dispersive continuum emanating from soft lines that extend along (100). The data indicate fractionalized spinon-like excitations with quasi-one-dimensional dispersion within a quasi-two-dimensional spin system.