2018/07/31 by Huanhuan Yang, C. Wang, Tianlin Yu +2 · 2 citations
Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Ferromagnetism #Magnetic properties of thin films #Magnonics #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Spin polarization #Spintronics #Superconductivity #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.121.197201
published as Phys. Rev. Lett. 121, 197201 (2018) · 6 pages, 5 figures, accepted by PRL
arxiv created 2018/10/17 · openalex publication_date 2018/11/05 · arxiv updated 2018/11/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a theoretical mapping to show that a ferromagnet with gain (loss) is equivalent to an antiferromagnet with an equal amount of loss (gain). Our findings indicate a novel first-order ferromagnet-antiferromagnet phase transition by tuning the gain-loss parameter. As an appealing application, we demonstrate the realization as well as the manipulation of the antiferromagnetic Skyrmion, a stable topological quasiparticle not yet observed experimentally, in a chiral ferromagnetic thin film with gain. We also consider ferromagnetic bilayers with balanced gain and loss and show that the antiferromagnetic Skyrmion can be found only in cases with a broken parity-time symmetry phase. Our results pave the way for investigating the emerging antiferromagnetic spintronics and parity-time symmetric magnonics in ferromagnets.