Scholarlink

<p>A major challenge in condensed matter physics is integrating topological phenomena with correlated electron physics to leverage both types of states for next-generation quantum devices. Metal-insulator transitions are central to bridging these two domains while simultaneously serving as on-off switches for electronic states. Here, we demonstrate how the prototypical material of K<sub>2</sub>Cr<sub>8</sub>O<sub>16</sub> undergoes a ferromagnetic metal-insulator transition accompanied by a change in band topology. Through inelastic x-ray and neutron scattering experiments combined with first-principles theoretical calculations, we show that this transition is not driven by a Peierls mechanism, given the lack of phonon softening. Instead, we establish the transition as a topological metal-insulator transition within the ferromagnetic phase with potential axionic properties, where electron correlations play a key role in stabilizing the insulating state. These results reveal how a metal-insulator transition provides a pathway through which magnetism, topology, and electronic correlations interact.</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

Topological metal-insulator transition within the ferromagnetic state

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月27日

查看全文
  • Ola Kenji Forslund,
  • Chin Shen Ong,
  • Moritz M. Hirschmann,
  • Nicolas Gauthier,
  • Hiroshi Uchiyama,
  • Christian Tzschaschel,
  • Daniel G. Mazzone,
  • Romain Sibille,
  • Antonio M. dos Santos,
  • Masafumi Horio,
  • Elisabetta Nocerino,
  • Nami Matsubara,
  • Deepak John Mukkattukavil,
  • Konstantinos Papadopoulos,
  • Kazuya Kamazawa,
  • Kazuhiko Ikeuchi,
  • Hidenori Takagi,
  • Masahiko Isobe,
  • Jun Sugiyama,
  • Johan Chang,
  • Yasmine Sassa,
  • Olle Eriksson,
  • Martin Månsson

摘要

A major challenge in condensed matter physics is integrating topological phenomena with correlated electron physics to leverage both types of states for next-generation quantum devices. Metal-insulator transitions are central to bridging these two domains while simultaneously serving as on-off switches for electronic states. Here, we demonstrate how the prototypical material of K2Cr8O16 undergoes a ferromagnetic metal-insulator transition accompanied by a change in band topology. Through inelastic x-ray and neutron scattering experiments combined with first-principles theoretical calculations, we show that this transition is not driven by a Peierls mechanism, given the lack of phonon softening. Instead, we establish the transition as a topological metal-insulator transition within the ferromagnetic phase with potential axionic properties, where electron correlations play a key role in stabilizing the insulating state. These results reveal how a metal-insulator transition provides a pathway through which magnetism, topology, and electronic correlations interact.