454
L. Shen et al.
antiferromagnetic skyrmions in a racetrack with a defect caused by the local variation of magnetic anisotropy. In addition to studying the dynamics of skyrmions in
an antiferromagnetic racetrack, we also discussed the dynamic behavior of antiferromagnetic skyrmions in a nanodisk. In particular, we pointed out that driving an
antiferromagnetic skyrmion to move in a circular motion on a nanodisk, one may get
an oscillation signal with high frequencies (tens of gigahertz). These results are useful
for understanding skyrmion and bimeron physics in antiferromagnetic systems, and
may provide guidelines for building spintronic devices based on antiferromagnetic
textures.
Acknowledgements X.Z. acknowledges the support by the National Natural Science Foundation of China (Grant No. 12004320), and the Guangdong Basic and Applied Basic Research
Foundation (Grant No. 2019A1515110713). M.E. acknowledges the support from the Grants-inAid for Scientific Research from JSPS KAKENHI (Grant Nos. JP18H03676, JP17K05490 and
JP15H05854) and the support from CREST, JST (Grant Nos. JPMJCR16F1 and JPMJCR1874).
O.A.T. acknowledges the support by the Australian Research Council (Grant No. DP200101027),
the Cooperative Research Project Program at the Research Institute of Electrical Communication, Tohoku University (Japan), and by the NCMAS grant. Y.Z. acknowledges the support by the
Guangdong Special Support Project (Grant No. 2019BT02X030), Shenzhen Peacock Group Plan
(Grant No. KQTD20180413181702403), Pearl River Recruitment Program of Talents (Grant No.
2017GC010293), and National Natural Science Foundation of China (Grant Nos. 11974298 and
61961136006).
References
1. T. Jungwirth, X. Marti, P. Wadley, J. Wunderlich, Antiferromagnetic spintronics. Nat.
Nanotechnol. 11, 231 (2016)
2. V. Baltz, A. Manchon, M. Tsoi, T. Moriyama, T. Ono, Y. Tserkovnyak, Antiferromagnetic
spintronics. Rev. Mod. Phys. 90, 015005 (2018)
3. O. Gomonay, V. Baltz, A. Brataas, Y. Tserkovnyak, Antiferromagnetic spin textures and
dynamics. Nat. Phys. 14, 213 (2018)
4. L. Šmejkal, Y. Mokrousov, B. Yan, A.H. MacDonald, Topological antiferromagnetic spintronics. Nat. Phys. 14, 242 (2018)
5. T.L. Gilbert, A phenomenological theory of damping in ferromagnetic materials. IEEE Trans.
Magn. 40, 3443 (2004)
6. F. Keffer, C. Kittel, Theory of antiferromagnetic resonance. Phys. Rev. 85, 329 (1952)
7. R. Cheng, D. Xiao, A. Brataas, Terahertz antiferromagnetic spin hall nano-oscillator. Phys.
Rev. Lett. 116, 207603 (2016)
8. O. Gomonay, T. Jungwirth, J. Sinova, High antiferromagnetic domain wall velocity induced
by Neel spin-orbit torques. Phys. Rev. Lett. 117, 017202 (2016)
9. T. Shiino, S.H. Oh, P.M. Haney, S.W. Lee, G. Go, B.G. Park, K.J. Lee, Antiferromagnetic
domain wall motion driven by spin-orbit torques. Phys. Rev. Lett. 117, 087203 (2016)
10. E.G. Tveten, A. Qaiumzadeh, O.A. Tretiakov, A. Brataas, Staggered dynamics in antiferromagnets by collective coordinates. Phys. Rev. Lett. 110, 127208 (2013)
11. Y. Zhou, Magnetic skyrmions: Intriguing physics and new spintronic device concepts. Natl.
Sci. Rev. 6, 210 (2019)
12. X. Zhang, Y. Zhou, K. Mee Song, T. E. Park, J. Xia, M. Ezawa, X. Liu, W. Zhao, G. Zhao,
S. Woo, Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions
toward spintronic applications, J. Phys.: Condens. Matter 32, 143001 (2019)
L. Shen et al.
antiferromagnetic skyrmions in a racetrack with a defect caused by the local variation of magnetic anisotropy. In addition to studying the dynamics of skyrmions in
an antiferromagnetic racetrack, we also discussed the dynamic behavior of antiferromagnetic skyrmions in a nanodisk. In particular, we pointed out that driving an
antiferromagnetic skyrmion to move in a circular motion on a nanodisk, one may get
an oscillation signal with high frequencies (tens of gigahertz). These results are useful
for understanding skyrmion and bimeron physics in antiferromagnetic systems, and
may provide guidelines for building spintronic devices based on antiferromagnetic
textures.
Acknowledgements X.Z. acknowledges the support by the National Natural Science Foundation of China (Grant No. 12004320), and the Guangdong Basic and Applied Basic Research
Foundation (Grant No. 2019A1515110713). M.E. acknowledges the support from the Grants-inAid for Scientific Research from JSPS KAKENHI (Grant Nos. JP18H03676, JP17K05490 and
JP15H05854) and the support from CREST, JST (Grant Nos. JPMJCR16F1 and JPMJCR1874).
O.A.T. acknowledges the support by the Australian Research Council (Grant No. DP200101027),
the Cooperative Research Project Program at the Research Institute of Electrical Communication, Tohoku University (Japan), and by the NCMAS grant. Y.Z. acknowledges the support by the
Guangdong Special Support Project (Grant No. 2019BT02X030), Shenzhen Peacock Group Plan
(Grant No. KQTD20180413181702403), Pearl River Recruitment Program of Talents (Grant No.
2017GC010293), and National Natural Science Foundation of China (Grant Nos. 11974298 and
61961136006).
References
1. T. Jungwirth, X. Marti, P. Wadley, J. Wunderlich, Antiferromagnetic spintronics. Nat.
Nanotechnol. 11, 231 (2016)
2. V. Baltz, A. Manchon, M. Tsoi, T. Moriyama, T. Ono, Y. Tserkovnyak, Antiferromagnetic
spintronics. Rev. Mod. Phys. 90, 015005 (2018)
3. O. Gomonay, V. Baltz, A. Brataas, Y. Tserkovnyak, Antiferromagnetic spin textures and
dynamics. Nat. Phys. 14, 213 (2018)
4. L. Šmejkal, Y. Mokrousov, B. Yan, A.H. MacDonald, Topological antiferromagnetic spintronics. Nat. Phys. 14, 242 (2018)
5. T.L. Gilbert, A phenomenological theory of damping in ferromagnetic materials. IEEE Trans.
Magn. 40, 3443 (2004)
6. F. Keffer, C. Kittel, Theory of antiferromagnetic resonance. Phys. Rev. 85, 329 (1952)
7. R. Cheng, D. Xiao, A. Brataas, Terahertz antiferromagnetic spin hall nano-oscillator. Phys.
Rev. Lett. 116, 207603 (2016)
8. O. Gomonay, T. Jungwirth, J. Sinova, High antiferromagnetic domain wall velocity induced
by Neel spin-orbit torques. Phys. Rev. Lett. 117, 017202 (2016)
9. T. Shiino, S.H. Oh, P.M. Haney, S.W. Lee, G. Go, B.G. Park, K.J. Lee, Antiferromagnetic
domain wall motion driven by spin-orbit torques. Phys. Rev. Lett. 117, 087203 (2016)
10. E.G. Tveten, A. Qaiumzadeh, O.A. Tretiakov, A. Brataas, Staggered dynamics in antiferromagnets by collective coordinates. Phys. Rev. Lett. 110, 127208 (2013)
11. Y. Zhou, Magnetic skyrmions: Intriguing physics and new spintronic device concepts. Natl.
Sci. Rev. 6, 210 (2019)
12. X. Zhang, Y. Zhou, K. Mee Song, T. E. Park, J. Xia, M. Ezawa, X. Liu, W. Zhao, G. Zhao,
S. Woo, Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions
toward spintronic applications, J. Phys.: Condens. Matter 32, 143001 (2019)