首页|Recent progress on valley polarization and valley-polarized topological states in two-dimensional materials
Recent progress on valley polarization and valley-polarized topological states in two-dimensional materials
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Valleytronics,using valley degree of freedom to encode,process,and store information,may find practical ap-plications in low-power-consumption devices.Recent theoretical and experimental studies have demonstrated that two-dimensional(2D)honeycomb lattice systems with inversion symmetry breaking,such as transition-metal dichalcogenides(TMDs),are ideal candidates for realizing valley polarization.In addition to the optical field,lifting the valley degeneracy of TMDs by introducing magnetism is an efficient way to manipulate the valley degree of freedom.In this paper,we first review the recent progress on valley polarization in various TMD-based systems,including magnetically doped TMDs,intrinsic TMDs with both inversion and time-reversal symmetry broken,and magnetic TMD heterostructures.When topo-logically nontrivial bands are empowered into valley-polarized systems,valley-polarized topological states,namely valley-polarized quantum anomalous Hall effect can be realized.Therefore,we have also reviewed the theoretical proposals for realizing valley-polarized topological states in 2D honeycomb lattices.Our paper can help readers quickly grasp the latest research developments in this field.
valley polarizationvalley-polarized topological statestwo-dimensional material
王斐、张亚玲、杨文佳、张会生、许小红
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Key Laboratory of Magnetic Molecules and Magnetic Information Materials of the Ministry of Education,and Research Institute of Materials Science,Shanxi Normal University,Taiyuan 030006,China
College of Physics and Electronic Information,Shanxi Normal University,Taiyuan 030006,China
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