Huimin Sun

Nov 11, 2024 | onlinelibrary.wiley.com | Huimin Sun |Shuhui Yang |Yan Lin

Via the new weight function A p → θ ( φ ) $$ {A}_{\overrightarrow{p}}^{\theta}\left(\varphi \right) $$ , the authors introduce a new class of multilinear Littlewood–Paley g λ ∗ $$ {g}_{\lambda}^{\ast } $$ functions and establish the boundedness on weighted Lebesgue spaces.

Aug 21, 2023 | nature.com | Huimin Sun |Guoqiang Yu

AbstractMagnetization in a ferromagnetic layer could be manipulated by the spin-orbit torque whose generation commonly relies on the spin-orbit coupling from the adjacent heavy-metal layer within the bilayer. The fact that the magnetic topological insulator possesses both the ferromagnetic order with perpendicular anisotropy and inherent spin-orbit coupling inspires to realize such a torque-induced magnetization switching without forming any heterostructure with other materials.

Aug 6, 2023 | nature.com | Huimin Sun |Bin Zhang |Chen Wang

AbstractThe quasi-1D chiral edge states in a quantum anomalous Hall insulator are dissipationless, while the 2D helical surface states in a topological insulator are insensitive to spin-independent scatterings due to the topological protection. Both serve as essential ingredients for topological electronics. Here, we integrate these states into a single device using selective area epitaxy based on the molecular beam epitaxy technique.