Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi
Abstract The noncentrosymmetric ferromagnetic Weyl semimetal CeAlSi with simultaneous space-inversion and time-reversal symmetry breaking provides a unique platform for exploring novel topological states. Here, by employing multiple experimental techniques, we demonstrate that ferromagnetism and pre...
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| Format: | Article |
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Nature Portfolio
2024-02-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-45658-5 |
| _version_ | 1797273949485137920 |
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| author | Erjian Cheng Limin Yan Xianbiao Shi Rui Lou Alexander Fedorov Mahdi Behnami Jian Yuan Pengtao Yang Bosen Wang Jin-Guang Cheng Yuanji Xu Yang Xu Wei Xia Nikolai Pavlovskii Darren C. Peets Weiwei Zhao Yimin Wan Ulrich Burkhardt Yanfeng Guo Shiyan Li Claudia Felser Wenge Yang Bernd Büchner |
| author_facet | Erjian Cheng Limin Yan Xianbiao Shi Rui Lou Alexander Fedorov Mahdi Behnami Jian Yuan Pengtao Yang Bosen Wang Jin-Guang Cheng Yuanji Xu Yang Xu Wei Xia Nikolai Pavlovskii Darren C. Peets Weiwei Zhao Yimin Wan Ulrich Burkhardt Yanfeng Guo Shiyan Li Claudia Felser Wenge Yang Bernd Büchner |
| author_sort | Erjian Cheng |
| collection | DOAJ |
| description | Abstract The noncentrosymmetric ferromagnetic Weyl semimetal CeAlSi with simultaneous space-inversion and time-reversal symmetry breaking provides a unique platform for exploring novel topological states. Here, by employing multiple experimental techniques, we demonstrate that ferromagnetism and pressure can serve as efficient parameters to tune the positions of Weyl nodes in CeAlSi. At ambient pressure, a magnetism-facilitated anomalous Hall/Nernst effect (AHE/ANE) is uncovered. Angle-resolved photoemission spectroscopy (ARPES) measurements demonstrated that the Weyl nodes with opposite chirality are moving away from each other upon entering the ferromagnetic phase. Under pressure, by tracing the pressure evolution of AHE and band structure, we demonstrate that pressure could also serve as a pivotal knob to tune the positions of Weyl nodes. Moreover, multiple pressure-induced phase transitions are also revealed. These findings indicate that CeAlSi provides a unique and tunable platform for exploring exotic topological physics and electron correlations, as well as catering to potential applications, such as spintronics. |
| first_indexed | 2024-03-07T14:51:26Z |
| format | Article |
| id | doaj.art-4f36591062704ab98234fc15e6518a09 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-07T14:51:26Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-4f36591062704ab98234fc15e6518a092024-03-05T19:39:00ZengNature PortfolioNature Communications2041-17232024-02-0115111010.1038/s41467-024-45658-5Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSiErjian Cheng0Limin Yan1Xianbiao Shi2Rui Lou3Alexander Fedorov4Mahdi Behnami5Jian Yuan6Pengtao Yang7Bosen Wang8Jin-Guang Cheng9Yuanji Xu10Yang Xu11Wei Xia12Nikolai Pavlovskii13Darren C. Peets14Weiwei Zhao15Yimin Wan16Ulrich Burkhardt17Yanfeng Guo18Shiyan Li19Claudia Felser20Wenge Yang21Bernd Büchner22Leibniz Institute for Solid State and Materials Research (IFW-Dresden)Center for High Pressure Science and Technology Advanced ResearchState Key Laboratory of Advanced Welding & Joining, Harbin Institute of TechnologyLeibniz Institute for Solid State and Materials Research (IFW-Dresden)Leibniz Institute for Solid State and Materials Research (IFW-Dresden)Leibniz Institute for Solid State and Materials Research (IFW-Dresden)School of Physical Science and Technology, ShanghaiTech UniversityBeijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of SciencesInstitute for Applied Physics, University of Science and Technology BeijingKey Laboratory of Polar Materials and Devices (MOE), School of Physics and Electronic Science, East China Normal UniversitySchool of Physical Science and Technology, ShanghaiTech UniversityInstitute of Solid State and Materials Physics, Technische Universität DresdenInstitute of Solid State and Materials Physics, Technische Universität DresdenState Key Laboratory of Advanced Welding & Joining, Harbin Institute of TechnologyState Key Laboratory of Surface Physics, and Department of Physics, Fudan UniversityMax Planck Institute for Chemical Physics of SolidsSchool of Physical Science and Technology, ShanghaiTech UniversityState Key Laboratory of Surface Physics, and Department of Physics, Fudan UniversityMax Planck Institute for Chemical Physics of SolidsCenter for High Pressure Science and Technology Advanced ResearchLeibniz Institute for Solid State and Materials Research (IFW-Dresden)Abstract The noncentrosymmetric ferromagnetic Weyl semimetal CeAlSi with simultaneous space-inversion and time-reversal symmetry breaking provides a unique platform for exploring novel topological states. Here, by employing multiple experimental techniques, we demonstrate that ferromagnetism and pressure can serve as efficient parameters to tune the positions of Weyl nodes in CeAlSi. At ambient pressure, a magnetism-facilitated anomalous Hall/Nernst effect (AHE/ANE) is uncovered. Angle-resolved photoemission spectroscopy (ARPES) measurements demonstrated that the Weyl nodes with opposite chirality are moving away from each other upon entering the ferromagnetic phase. Under pressure, by tracing the pressure evolution of AHE and band structure, we demonstrate that pressure could also serve as a pivotal knob to tune the positions of Weyl nodes. Moreover, multiple pressure-induced phase transitions are also revealed. These findings indicate that CeAlSi provides a unique and tunable platform for exploring exotic topological physics and electron correlations, as well as catering to potential applications, such as spintronics.https://doi.org/10.1038/s41467-024-45658-5 |
| spellingShingle | Erjian Cheng Limin Yan Xianbiao Shi Rui Lou Alexander Fedorov Mahdi Behnami Jian Yuan Pengtao Yang Bosen Wang Jin-Guang Cheng Yuanji Xu Yang Xu Wei Xia Nikolai Pavlovskii Darren C. Peets Weiwei Zhao Yimin Wan Ulrich Burkhardt Yanfeng Guo Shiyan Li Claudia Felser Wenge Yang Bernd Büchner Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi Nature Communications |
| title | Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi |
| title_full | Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi |
| title_fullStr | Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi |
| title_full_unstemmed | Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi |
| title_short | Tunable positions of Weyl nodes via magnetism and pressure in the ferromagnetic Weyl semimetal CeAlSi |
| title_sort | tunable positions of weyl nodes via magnetism and pressure in the ferromagnetic weyl semimetal cealsi |
| url | https://doi.org/10.1038/s41467-024-45658-5 |
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