Scholarlink

<p>Magnetic nodal line semimetals, defined by twofold degenerate gapless crossings along extended momentum paths, offer significant potential for spintronics and future information technologies. Despite their potential, these systems are rare in nature, with only few examples known to date. Here, using spin- and angle-resolved photoemission spectroscopy and density functional theory-based calculations, we classify ferromagnetic hexagonal close-packed (hcp) cobalt as a prototypical system exhibiting these properties. We demonstrate that manifolds of magnetic gapless nodal rings enclosing the Γ and K points in the <i>k</i><sub><i>z</i></sub>&#xa0;=&#xa0;0 plane, and magnetic nodal lines spanning the entire A-L path in the <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({k}_{z}=\frac{\pi }{c}\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mi>k</mi> </mrow> <mrow> <mi>z</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <mi>π</mi> </mrow> <mrow> <mi>c</mi> </mrow> </mfrac> </math></EquationSource> </InlineEquation> plane, coexist and dominate the fermiology of this elemental system. These mirror-protected bulk crossing points are associated with surface states, both of which exhibit controllable spin textures. This work is the first identification of cobalt as a simple, yet highly tunable and rich topological platform for exploring and manipulating spin-polarised Weyl-like nodal lines at room temperature.</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

Manifold of magnetic nodal lines in an elemental ferromagnet

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月24日

查看全文
  • O. J. Clark,
  • M. Garcia-Diez,
  • J. Fink,
  • O. Rader,
  • R. Miranda,
  • M. G. Vergniory,
  • J. Sánchez-Barriga

摘要

Magnetic nodal line semimetals, defined by twofold degenerate gapless crossings along extended momentum paths, offer significant potential for spintronics and future information technologies. Despite their potential, these systems are rare in nature, with only few examples known to date. Here, using spin- and angle-resolved photoemission spectroscopy and density functional theory-based calculations, we classify ferromagnetic hexagonal close-packed (hcp) cobalt as a prototypical system exhibiting these properties. We demonstrate that manifolds of magnetic gapless nodal rings enclosing the Γ and K points in the kz = 0 plane, and magnetic nodal lines spanning the entire A-L path in the \({k}_{z}=\frac{\pi }{c}\) k z = π c plane, coexist and dominate the fermiology of this elemental system. These mirror-protected bulk crossing points are associated with surface states, both of which exhibit controllable spin textures. This work is the first identification of cobalt as a simple, yet highly tunable and rich topological platform for exploring and manipulating spin-polarised Weyl-like nodal lines at room temperature.