Magnetic oscillations of Dirac surface states of topological insulators are expected to be associated with the formation of Landau levels or the Aharonov-Bohm effect. We instead study the conductance of Dirac surface states subjected to an in-plane magnetic field in presence of a barrier potential. Strikingly, we find that, in the case of large barrier potentials, the surface states exhibit pronounced oscillations in the conductance when varying the magnetic field, in the \textit{absence} of Landau levels or the Aharonov-Bohm effect. These novel magnetic oscillations are attributed to the emergence of \textit{super-resonant regimes} by tuning the magnetic field, in which almost all propagating electrons cross the barrier with perfect transmission. In the case of small and moderate barrier potentials, we also identify a positive magnetoconductance which is due to the increase of the Fermi surface by tilting the surface Dirac cone. Moreover, we show that for weak magnetic fields, the conductance displays a shifted sinusoidal dependence on the field direction with period $π$ and phase shift determined by the tilting direction with respect to the field direction. Our predictions can be applied to many topological insulators, such as HgTe and Bi$_{2}$Se$_{3}$, and provide important insights into exploring and understanding exotic magnetotransport properties of topological surface states.
Giant resonant nonlinear THz valley Hall effect in 2D Dirac semiconductors
Guangdong Technion – Israel Institute of Technology（广东以色列理工学院）；Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Science（俄罗斯科学院西伯利亚分院热诺夫半导体物理研究所）；Novosibirsk State Technical University（新西伯利亚国立技术大学）；Technion – Israel Institute of Technology（以色列理工学院）
Quantum states and optics in a {\it p}-type heterojunction with lateral surface quantum dot or antidot superlattice subjected to perpendicular magnetic field
Quantum states and magnetooptics in n- and p-type heterojunctions with lateral surface quantum dot (antidot) superlattice subjected to perpendicular magnetic field
Magnetoplasmon-Mediated Resonant Photogalvanic Effect in a Gated Strip of 2D Electrons
Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences（俄罗斯科学院科捷尔尼科夫无线电电子学研究所）；National Research University Higher School of Economics（国立高等经济大学）
Interplay between s-d exchange interaction and Rashba effect: spin-polarized transport
研究了在垂直磁场和电场作用下n型稀磁窄隙半导体量子阱中二维电子气的自旋极化输运性质。有趣的拍频模式中的磁阻被发现，可以通过改变电场显着调谐。发现了自旋极化电流的共振增强，这是由s-d交换相互作用和Rashba效应之间的竞争引起的[Y. A. Bychkov和E. I. Rashba，J.Phys.C17，6039（1984）]。
Terahertz radiation-induced conductivity, Kerr and Faraday angles, and spin textures in a two-dimensional electron gas with spin-orbit coupling subjected to a high magnetic field and periodic potential
