9 papers
Spin-group theory on Edelstein effect and spin-orbit torque in Collinear Ferromagnets
Yizhuo Song, Qing Zhang, Jiahao Shentu +2
Current-induced spin-orbit torques (SOTs) are central to the electrical manipulation of magnetic order in spintronic devices. In transition-metal/collinear ferromagnet bilayers, fi…
Spin Hall Effect in Collinear Ferromagnets from Spin-Group Symmetry
Qing Zhang, Yizhuo Song, Jiahao Shentu +2
Magnetic materials support both time-reversal-even (T-even) and time-reversal-odd (T-odd) spin Hall currents, yet their underlying microscopic origins remain elusive. Here, we eluc…
Dzyaloshinskii-Moriya Gradients Unlock Topological Dimensional Reduction in Magnetic Hopfions
Kui Yuan, Hailong Shen, Jiawei Dong +12
Three-dimensional magnetic solitons retain topological protection only while their spin field remains continuous. Here we show that chemical inhomogeneity can break this protection…
Dynamic topological exciton-polaritons enabling ultrafast logic operations
Feng Jin, Hao Zheng, Zhe Zhang +7
Topological active materials have emerged as powerful paradigm bridging the discovery of exotic topological phases of matter with the development of functional topological devices.…
Ultrahigh Charge-to-Spin Conversion and Tunneling Magnetoresistance in Quasi-Two-Dimensional d-wave Altermagnet
Qing Zhang, Siyun Wang, Jianting Dong +1
The emergence of altermagnets has driven groundbreaking advances in spintronics. Notably, d-wave altermagnets support non-relativistic spin transport, efficient charge-to-spin conv…
Electron Doping Stabilization of Highly-Polar Supertetragonal BaSnO3
Qing Zhang, Karin M. Rabe, Xiaohui Liu
Could electrons stabilize ferroelectric polarization in unpolarized system? Basically, electron doping was thought to be contrary to polarization due to the well-known picture that…
Large magnon dichroism and other optical properties of hexagonal ferrite h-Lu0.6Sc0.4FeO3 with altermagnetic A2 spin ordering
V. A. Martinez, A. A. Sirenko, L. Bugnon +8
Multiferroic hexagonal h-Lu0.6Sc0.4FeO3 single crystals with non-collinear spins were studied using the THz and Raman scattering spectroscopies and ellipsometry. Antiferromagnetic…
Doping-induced Polyamorphic Transitions in Fluorite Oxides
Hao Yang, Qiaotong Luan, Qing Zhang +5
Fluorite oxides such as HfO exhibit rich and tunable phase behavior, making them promising candidates for next generation electronic devices. A key challenge is to design amorp…
Spin dynamics and magnetic excitations of quasi-1D spin chain CaZnMnO
Suheon Lee, D. T. Adroja, Qing Zhang +7
To reveal the structure-property relationship in quasi-one-dimensional (1D) spin-chain system CaZnMnO, we present comprehensive results, combining basic physical characteri…