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<p>Frustration of long-range order via lattice geometry amplifies fluctuations and generates ground states that are highly sensitive to perturbations. Traditionally, geometric frustration is used to engineer unconventional magnetic states; however, the charge degree of freedom and bond order can be similarly frustrated. Finding materials that host both frustrated magnetic and bond networks holds promise for engineering structural and magnetic states with the potential of coupling to one another via either magnetic or strain fields. Here we identify an unusual instance of this coexistence in the triangular lattice antiferromagnets LnCd<sub>3</sub>P<sub>3</sub> (Ln = lanthanides). These compounds feature two-dimensional planes of unique trigonal planar CdP<sub>3</sub> units with an underlying bond instability that is frustrated via emergent kagome ice correlations. This bond instability is interleaved in between layers of frustrated magnetic moments. Our results establish LnCd<sub>3</sub>P<sub>3</sub> as a rare materials class in which frustrated magnetism is embedded within a dopable semiconductor with a frustrated bond order instability.</p>

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Interleaved bond frustration in a triangular lattice antiferromagnet

  • 期刊论文

  • 发表日期：

    2025年10月22日

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  • S. J. Gomez Alvarado,
  • J. R. Chamorro,
  • D. Rout,
  • J. Hielscher,
  • Sarah Schwarz,
  • Caeli Benyacko,
  • M. B. Stone,
  • V. Ovidiu Garlea,
  • A. R. Jackson,
  • G. Pokharel,
  • R. Gomez,
  • B. R. Ortiz,
  • Suchismita Sarker,
  • L. Kautzsch,
  • L. C. Gallington,
  • R. Seshadri,
  • Stephen D. Wilson

摘要

Frustration of long-range order via lattice geometry amplifies fluctuations and generates ground states that are highly sensitive to perturbations. Traditionally, geometric frustration is used to engineer unconventional magnetic states; however, the charge degree of freedom and bond order can be similarly frustrated. Finding materials that host both frustrated magnetic and bond networks holds promise for engineering structural and magnetic states with the potential of coupling to one another via either magnetic or strain fields. Here we identify an unusual instance of this coexistence in the triangular lattice antiferromagnets LnCd3P3 (Ln = lanthanides). These compounds feature two-dimensional planes of unique trigonal planar CdP3 units with an underlying bond instability that is frustrated via emergent kagome ice correlations. This bond instability is interleaved in between layers of frustrated magnetic moments. Our results establish LnCd3P3 as a rare materials class in which frustrated magnetism is embedded within a dopable semiconductor with a frustrated bond order instability.