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Discovery of an Antiferromagnetic Topological Nodal-line Kondo Semimetal

Fuente: arXiv

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Autori principali:	Liu, D. F., Xu, Y. F., Hu, H. Y., Liu, J. Y., Ying, T. P., Lv, Y. Y., Jiang, Y., Chen, C., Yang, Y. H., Pei, D., Prabhakaran, D., Gao, M. H., Wang, J. J., Zhang, Q. H., Meng, F. Q., Thiagarajan, B., Polley, C., Hashimoto, M., Lu, D. H., Schröter, N. B. M., Strocov, V. N., Louat, A., Cacho, C., Biswas, D., Lee, T. -L., Steadman, P., Bencok, P., Chen, Y. B., Gu, L., Hesjedal, T., van der Laan, G., Hosono, H., Yang, L. X., Liu, Z. K., Yuan, H. Q., Bernevig, B. A., Chen, Y. L.
Natura:	Preprint
Pubblicazione:	2024
Soggetti:	Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science
Accesso online:	Acceder al recurso
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_version_	1866911620095016960
author	Liu, D. F. Xu, Y. F. Hu, H. Y. Liu, J. Y. Ying, T. P. Lv, Y. Y. Jiang, Y. Chen, C. Yang, Y. H. Pei, D. Prabhakaran, D. Gao, M. H. Wang, J. J. Zhang, Q. H. Meng, F. Q. Thiagarajan, B. Polley, C. Hashimoto, M. Lu, D. H. Schröter, N. B. M. Strocov, V. N. Louat, A. Cacho, C. Biswas, D. Lee, T. -L. Steadman, P. Bencok, P. Chen, Y. B. Gu, L. Hesjedal, T. van der Laan, G. Hosono, H. Yang, L. X. Liu, Z. K. Yuan, H. Q. Bernevig, B. A. Chen, Y. L.
author_facet	Liu, D. F. Xu, Y. F. Hu, H. Y. Liu, J. Y. Ying, T. P. Lv, Y. Y. Jiang, Y. Chen, C. Yang, Y. H. Pei, D. Prabhakaran, D. Gao, M. H. Wang, J. J. Zhang, Q. H. Meng, F. Q. Thiagarajan, B. Polley, C. Hashimoto, M. Lu, D. H. Schröter, N. B. M. Strocov, V. N. Louat, A. Cacho, C. Biswas, D. Lee, T. -L. Steadman, P. Bencok, P. Chen, Y. B. Gu, L. Hesjedal, T. van der Laan, G. Hosono, H. Yang, L. X. Liu, Z. K. Yuan, H. Q. Bernevig, B. A. Chen, Y. L.
contents	The symbiosis of strong interactions, flat bands, topology and symmetry has led to the discovery of exotic phases of matter, including fractional Chern insulators, correlated moiré topological superconductors, and Dirac and Weyl semimetals. Correlated metals, such as those present in Kondo lattices, rely on the screening of local moments by a sea of non-magnetic conduction electrons. Here, we report on a unique topological Kondo lattice compound, CeCo2P2, where the Kondo effect - whose existence under the magnetic Co phase is protected by PT symmetry - coexists with antiferromagnetic order emerging from the flat bands associated with the Co atoms. Remarkably, this is the only known Kondo lattice compound where magnetic order occurs in non-heavy electrons, and puzzlingly, at a temperature significantly higher than that of the Kondo effect. Furthermore, at low temperatures, the emergence of the Kondo effect, in conjunction with a glide-mirror-z symmetry, results in a nodal line protected by bulk topology near the Fermi energy. These unusual properties, arising from the interplay between itinerant and correlated electrons from different constituent elements, lead to novel quantum phases beyond the celebrated topological Kondo insulators and Weyl Kondo semimetals. CeCo2P2 thus provides an ideal platform for investigating narrow bands, topology, magnetism, and the Kondo effect in strongly correlated electron systems.
format	Preprint
id	arxiv_https___arxiv_org_abs_2411_13898
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Discovery of an Antiferromagnetic Topological Nodal-line Kondo Semimetal Liu, D. F. Xu, Y. F. Hu, H. Y. Liu, J. Y. Ying, T. P. Lv, Y. Y. Jiang, Y. Chen, C. Yang, Y. H. Pei, D. Prabhakaran, D. Gao, M. H. Wang, J. J. Zhang, Q. H. Meng, F. Q. Thiagarajan, B. Polley, C. Hashimoto, M. Lu, D. H. Schröter, N. B. M. Strocov, V. N. Louat, A. Cacho, C. Biswas, D. Lee, T. -L. Steadman, P. Bencok, P. Chen, Y. B. Gu, L. Hesjedal, T. van der Laan, G. Hosono, H. Yang, L. X. Liu, Z. K. Yuan, H. Q. Bernevig, B. A. Chen, Y. L. Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science The symbiosis of strong interactions, flat bands, topology and symmetry has led to the discovery of exotic phases of matter, including fractional Chern insulators, correlated moiré topological superconductors, and Dirac and Weyl semimetals. Correlated metals, such as those present in Kondo lattices, rely on the screening of local moments by a sea of non-magnetic conduction electrons. Here, we report on a unique topological Kondo lattice compound, CeCo2P2, where the Kondo effect - whose existence under the magnetic Co phase is protected by PT symmetry - coexists with antiferromagnetic order emerging from the flat bands associated with the Co atoms. Remarkably, this is the only known Kondo lattice compound where magnetic order occurs in non-heavy electrons, and puzzlingly, at a temperature significantly higher than that of the Kondo effect. Furthermore, at low temperatures, the emergence of the Kondo effect, in conjunction with a glide-mirror-z symmetry, results in a nodal line protected by bulk topology near the Fermi energy. These unusual properties, arising from the interplay between itinerant and correlated electrons from different constituent elements, lead to novel quantum phases beyond the celebrated topological Kondo insulators and Weyl Kondo semimetals. CeCo2P2 thus provides an ideal platform for investigating narrow bands, topology, magnetism, and the Kondo effect in strongly correlated electron systems.
title	Discovery of an Antiferromagnetic Topological Nodal-line Kondo Semimetal
topic	Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science
url	https://arxiv.org/abs/2411.13898