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Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride
Magnetic transition metal chalcogenides form an emerging platform for exploring spin-orbit driven Berry phase phenomena owing to the nontrivial interplay between topology and magnetism. Here we show that the anomalous Hall effect in pristine Cr(2)Te(3) thin films manifests a unique temperature-depen...
Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10239464/ https://www.ncbi.nlm.nih.gov/pubmed/37270579 http://dx.doi.org/10.1038/s41467-023-38995-4 |
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author | Chi, Hang Ou, Yunbo Eldred, Tim B. Gao, Wenpei Kwon, Sohee Murray, Joseph Dreyer, Michael Butera, Robert E. Foucher, Alexandre C. Ambaye, Haile Keum, Jong Greenberg, Alice T. Liu, Yuhang Neupane, Mahesh R. de Coster, George J. Vail, Owen A. Taylor, Patrick J. Folkes, Patrick A. Rong, Charles Yin, Gen Lake, Roger K. Ross, Frances M. Lauter, Valeria Heiman, Don Moodera, Jagadeesh S. |
author_facet | Chi, Hang Ou, Yunbo Eldred, Tim B. Gao, Wenpei Kwon, Sohee Murray, Joseph Dreyer, Michael Butera, Robert E. Foucher, Alexandre C. Ambaye, Haile Keum, Jong Greenberg, Alice T. Liu, Yuhang Neupane, Mahesh R. de Coster, George J. Vail, Owen A. Taylor, Patrick J. Folkes, Patrick A. Rong, Charles Yin, Gen Lake, Roger K. Ross, Frances M. Lauter, Valeria Heiman, Don Moodera, Jagadeesh S. |
author_sort | Chi, Hang |
collection | PubMed |
description | Magnetic transition metal chalcogenides form an emerging platform for exploring spin-orbit driven Berry phase phenomena owing to the nontrivial interplay between topology and magnetism. Here we show that the anomalous Hall effect in pristine Cr(2)Te(3) thin films manifests a unique temperature-dependent sign reversal at nonzero magnetization, resulting from the momentum-space Berry curvature as established by first-principles simulations. The sign change is strain tunable, enabled by the sharp and well-defined substrate/film interface in the quasi-two-dimensional Cr(2)Te(3) epitaxial films, revealed by scanning transmission electron microscopy and depth-sensitive polarized neutron reflectometry. This Berry phase effect further introduces hump-shaped Hall peaks in pristine Cr(2)Te(3) near the coercive field during the magnetization switching process, owing to the presence of strain-modulated magnetic layers/domains. The versatile interface tunability of Berry curvature in Cr(2)Te(3) thin films offers new opportunities for topological electronics. |
format | Online Article Text |
id | pubmed-10239464 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-102394642023-06-05 Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride Chi, Hang Ou, Yunbo Eldred, Tim B. Gao, Wenpei Kwon, Sohee Murray, Joseph Dreyer, Michael Butera, Robert E. Foucher, Alexandre C. Ambaye, Haile Keum, Jong Greenberg, Alice T. Liu, Yuhang Neupane, Mahesh R. de Coster, George J. Vail, Owen A. Taylor, Patrick J. Folkes, Patrick A. Rong, Charles Yin, Gen Lake, Roger K. Ross, Frances M. Lauter, Valeria Heiman, Don Moodera, Jagadeesh S. Nat Commun Article Magnetic transition metal chalcogenides form an emerging platform for exploring spin-orbit driven Berry phase phenomena owing to the nontrivial interplay between topology and magnetism. Here we show that the anomalous Hall effect in pristine Cr(2)Te(3) thin films manifests a unique temperature-dependent sign reversal at nonzero magnetization, resulting from the momentum-space Berry curvature as established by first-principles simulations. The sign change is strain tunable, enabled by the sharp and well-defined substrate/film interface in the quasi-two-dimensional Cr(2)Te(3) epitaxial films, revealed by scanning transmission electron microscopy and depth-sensitive polarized neutron reflectometry. This Berry phase effect further introduces hump-shaped Hall peaks in pristine Cr(2)Te(3) near the coercive field during the magnetization switching process, owing to the presence of strain-modulated magnetic layers/domains. The versatile interface tunability of Berry curvature in Cr(2)Te(3) thin films offers new opportunities for topological electronics. Nature Publishing Group UK 2023-06-03 /pmc/articles/PMC10239464/ /pubmed/37270579 http://dx.doi.org/10.1038/s41467-023-38995-4 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Chi, Hang Ou, Yunbo Eldred, Tim B. Gao, Wenpei Kwon, Sohee Murray, Joseph Dreyer, Michael Butera, Robert E. Foucher, Alexandre C. Ambaye, Haile Keum, Jong Greenberg, Alice T. Liu, Yuhang Neupane, Mahesh R. de Coster, George J. Vail, Owen A. Taylor, Patrick J. Folkes, Patrick A. Rong, Charles Yin, Gen Lake, Roger K. Ross, Frances M. Lauter, Valeria Heiman, Don Moodera, Jagadeesh S. Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride |
title | Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride |
title_full | Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride |
title_fullStr | Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride |
title_full_unstemmed | Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride |
title_short | Strain-tunable Berry curvature in quasi-two-dimensional chromium telluride |
title_sort | strain-tunable berry curvature in quasi-two-dimensional chromium telluride |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10239464/ https://www.ncbi.nlm.nih.gov/pubmed/37270579 http://dx.doi.org/10.1038/s41467-023-38995-4 |
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