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RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
Hao-Ran Chang, Jianhui Zhou, Shi-Xiong Wang +2
We theoretically study the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between magnetic impurities in both Dirac and Weyl semimetals (SMs). We find that the internode process,…
Berry phase modification to the energy spectrum of excitons
Jianhui Zhou, Wen-Yu Shan, Wang Yao +1
By quantizing the semiclassical motion of excitons, we show that the Berry curvature can cause an energy splitting between exciton states with opposite angular momentum. This split…
Spin responses and effective Hamiltonian for the two dimensional electron gas at oxide interface {LaAlO}/{SrTiO}
Jianhui Zhou, Wen-Yu Shan, Di Xiao
Strong Rashba spin-orbit coupling (SOC) of the two-dimensional electron gas (2DEG) at the oxide interface underlies a variety of exotic physics, but…
Gate-tunable Topological Valley Transport in Bilayer Graphene
Mengqiao Sui, Guorui Chen, Liguo Ma +8
Valley pseudospin, the quantum degree of freedom characterizing the degenerate valleys in energy bands, is a distinct feature of two-dimensional Dirac materials. Similar to spin, t…
Optical generation and detection of pure valley current in monolayer transition metal dichalcogenides
Wen-Yu Shan, Jianhui Zhou, Di Xiao
We propose a practical scheme to generate a pure valley current in monolayer transition metal dichalcogenides by one-photon absorption of linearly polarized light. We show that the…