Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet
Abstract
The manipulation of topological states in quantum matter is an essential pursuit of fundamental physics and next-generation quantum technology. Here we report the magnetic manipulation of Weyl fermions in the kagome spin-orbit semimetal Co3Sn2S2, observed by high-resolution photoemission spectroscopy. We demonstrate the exchange collapse of spin-orbit-gapped ferromagnetic Weyl loops into paramagnetic Dirac loops under suppression of the magnetic order. We further observe that topological Fermi arcs disappear in the paramagnetic phase, suggesting the annihilation of exchange-split Weyl points. In conclusion, our findings indicate that magnetic exchange collapse naturally drives Weyl fermion annihilation, opening new opportunities for engineering topology under correlated order parameters.
- Authors:
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[1];
[3];
[4];
[3];
[6];
[8];
[9]
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- Princeton Univ., NJ (United States); RIKEN Center for Emergent Matter Science (CEMS), Wako (Japan)
- Princeton Univ., NJ (United States)
- Univ. of Zurich (Switzerland)
- Princeton Univ., NJ (United States); Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
- Max Planck Institute for Chemical Physics of Solids, Dresden (Germany); Technische Universität Dresden (Germany)
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
- Nanyang Technological Univ. (Singapore)
- Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
- Princeton Univ., NJ (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); European Research Council (ERC); National Research Foundation of Korea (NRF); Gordon and Betty Moore Foundation; German Research Foundation (DFG)
- OSTI Identifier:
- 1898384
- Grant/Contract Number:
- AC02-05CH11231; SC0012704; AC02-76SF00515; DMR-2011750; DGE-1656466; ERC-StG-Neupert-757867-PARATOP; PP00P2-176877; NRF-NRFF13-2021-0010; GBMF4547; GBMF9461; FG02-05ER46200; 247310070; 39085490
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 127; Journal Issue: 25; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Belopolski, Ilya, Cochran, Tyler A., Liu, Xiaoxiong, Cheng, Zi-Jia, Yang, Xian P., Guguchia, Zurab, Tsirkin, Stepan S., Yin, Jia-Xin, Vir, Praveen, Thakur, Gohil S., Zhang, Songtian S., Zhang, Junyi, Kaznatcheev, Konstantine, Cheng, Guangming, Chang, Guoqing, Multer, Daniel, Shumiya, Nana, Litskevich, Maksim, Vescovo, Elio, Kim, Timur K., Cacho, Cephise, Yao, Nan, Felser, Claudia, Neupert, Titus, and Hasan, M. Zahid. Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet. United States: N. p., 2021.
Web. doi:10.1103/physrevlett.127.256403.
Belopolski, Ilya, Cochran, Tyler A., Liu, Xiaoxiong, Cheng, Zi-Jia, Yang, Xian P., Guguchia, Zurab, Tsirkin, Stepan S., Yin, Jia-Xin, Vir, Praveen, Thakur, Gohil S., Zhang, Songtian S., Zhang, Junyi, Kaznatcheev, Konstantine, Cheng, Guangming, Chang, Guoqing, Multer, Daniel, Shumiya, Nana, Litskevich, Maksim, Vescovo, Elio, Kim, Timur K., Cacho, Cephise, Yao, Nan, Felser, Claudia, Neupert, Titus, & Hasan, M. Zahid. Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet. United States. https://doi.org/10.1103/physrevlett.127.256403
Belopolski, Ilya, Cochran, Tyler A., Liu, Xiaoxiong, Cheng, Zi-Jia, Yang, Xian P., Guguchia, Zurab, Tsirkin, Stepan S., Yin, Jia-Xin, Vir, Praveen, Thakur, Gohil S., Zhang, Songtian S., Zhang, Junyi, Kaznatcheev, Konstantine, Cheng, Guangming, Chang, Guoqing, Multer, Daniel, Shumiya, Nana, Litskevich, Maksim, Vescovo, Elio, Kim, Timur K., Cacho, Cephise, Yao, Nan, Felser, Claudia, Neupert, Titus, and Hasan, M. Zahid. Fri .
"Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet". United States. https://doi.org/10.1103/physrevlett.127.256403. https://www.osti.gov/servlets/purl/1898384.
@article{osti_1898384,
title = {Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet},
author = {Belopolski, Ilya and Cochran, Tyler A. and Liu, Xiaoxiong and Cheng, Zi-Jia and Yang, Xian P. and Guguchia, Zurab and Tsirkin, Stepan S. and Yin, Jia-Xin and Vir, Praveen and Thakur, Gohil S. and Zhang, Songtian S. and Zhang, Junyi and Kaznatcheev, Konstantine and Cheng, Guangming and Chang, Guoqing and Multer, Daniel and Shumiya, Nana and Litskevich, Maksim and Vescovo, Elio and Kim, Timur K. and Cacho, Cephise and Yao, Nan and Felser, Claudia and Neupert, Titus and Hasan, M. Zahid},
abstractNote = {The manipulation of topological states in quantum matter is an essential pursuit of fundamental physics and next-generation quantum technology. Here we report the magnetic manipulation of Weyl fermions in the kagome spin-orbit semimetal Co3Sn2S2, observed by high-resolution photoemission spectroscopy. We demonstrate the exchange collapse of spin-orbit-gapped ferromagnetic Weyl loops into paramagnetic Dirac loops under suppression of the magnetic order. We further observe that topological Fermi arcs disappear in the paramagnetic phase, suggesting the annihilation of exchange-split Weyl points. In conclusion, our findings indicate that magnetic exchange collapse naturally drives Weyl fermion annihilation, opening new opportunities for engineering topology under correlated order parameters.},
doi = {10.1103/physrevlett.127.256403},
journal = {Physical Review Letters},
number = 25,
volume = 127,
place = {United States},
year = {Fri Dec 17 00:00:00 EST 2021},
month = {Fri Dec 17 00:00:00 EST 2021}
}
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