Topological Metal-Insulator Transition within the Ferromagnetic state
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918367075500032 |
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| author | Forslund, Ola Kenji Ong, Chin Shen Hirschmann, Moritz M. Gauthier, Nicolas Uchiyama, Hiroshi Tzschaschel, Christian Mazzone, Daniel G. Sibille, Romain Santos, Antonio M. dos Horio, Masafumi Nocerino, Elisabetta Matsubara, Nami Mukkattukavil, Deepak John Papadopoulos, Konstantinos Kamazawa, Kazuya Ikeuchi, Kazuhiko Takagi, Hidenori Isobe, Masahiko Sugiyama, Jun Chang, Johan Sassa, Yasmine Eriksson, Olle Månsson, Martin |
| author_facet | Forslund, Ola Kenji Ong, Chin Shen Hirschmann, Moritz M. Gauthier, Nicolas Uchiyama, Hiroshi Tzschaschel, Christian Mazzone, Daniel G. Sibille, Romain Santos, Antonio M. dos Horio, Masafumi Nocerino, Elisabetta Matsubara, Nami Mukkattukavil, Deepak John Papadopoulos, Konstantinos Kamazawa, Kazuya Ikeuchi, Kazuhiko Takagi, Hidenori Isobe, Masahiko Sugiyama, Jun Chang, Johan Sassa, Yasmine Eriksson, Olle Månsson, Martin |
| contents | 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 (MITs) 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 MIT accompanied by a change in band topology. Through inelastic x-ray and neutron scattering experiments combined with first-principles theoretical calculations, we demonstrate that this transition is not driven by a Peierls mechanism, given the lack of phonon softening. Instead, we establish the transition as a topological MIT within the ferromagnetic phase (topological-FM-MIT) with potential axionic properties, where electron correlations play a key role in stabilizing the insulating state. This work pioneers the discovery of a topological-FM-MIT and represents a fundamentally new class of topological phase transitions, revealing a unique pathway through which magnetism, topology, and electronic correlations interact. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_07625 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Topological Metal-Insulator Transition within the Ferromagnetic state Forslund, Ola Kenji Ong, Chin Shen Hirschmann, Moritz M. Gauthier, Nicolas Uchiyama, Hiroshi Tzschaschel, Christian Mazzone, Daniel G. Sibille, Romain Santos, Antonio M. dos Horio, Masafumi Nocerino, Elisabetta Matsubara, Nami Mukkattukavil, Deepak John Papadopoulos, Konstantinos Kamazawa, Kazuya Ikeuchi, Kazuhiko Takagi, Hidenori Isobe, Masahiko Sugiyama, Jun Chang, Johan Sassa, Yasmine Eriksson, Olle Månsson, Martin Strongly Correlated Electrons 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 (MITs) 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 MIT accompanied by a change in band topology. Through inelastic x-ray and neutron scattering experiments combined with first-principles theoretical calculations, we demonstrate that this transition is not driven by a Peierls mechanism, given the lack of phonon softening. Instead, we establish the transition as a topological MIT within the ferromagnetic phase (topological-FM-MIT) with potential axionic properties, where electron correlations play a key role in stabilizing the insulating state. This work pioneers the discovery of a topological-FM-MIT and represents a fundamentally new class of topological phase transitions, revealing a unique pathway through which magnetism, topology, and electronic correlations interact. |
| title | Topological Metal-Insulator Transition within the Ferromagnetic state |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2511.07625 |