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10 papers · 2 filters
A Topological Spin Chern Pump
C. Q. Zhou, Y. F. Zhang, L. Sheng +3
We propose a one-dimensional electron model with parameters modulated adiabatically in closed cycles, which can continuously pump spin to leads. By defining the spin-polarized Wann…
Reducing the efficiency droop by lateral carrier confinement in InGaN/GaN quantum-well nanorods
Chentian Shi, Chunfeng Zhang, Fan Yang +6
Efficiency droop is a major obstacle facing high-power application of InGaN/GaN quantum-well (QW) light-emitting diodes. In this letter, we report the suppression of efficiency dro…
Floquet Weyl Semimetal Induced by Off-Resonant Light
Rui Wang, Baigeng Wang, Rui Shen +3
We propose that a Floquet Weyl semimetal state can be induced in three-dimensional topological insulators, either nonmagnetic or magnetic, by the application of off-resonant light.…
Defect recombination induced by density-activated carrier diffusion in nonpolar InGaN quantum wells
Fan Yang, Chunfeng Zhang, Chentian Shi +7
We report on the observation of carrier-diffusion-induced defect emission at high excitation density in a-plane InGaN single quantum wells. When increasing excitation density in a…
Quantum computing through electron propagation in the edge states of quantum spin Hall systems
Wei Chen, Zheng-Yuan Xue, Z. D. Wang +2
We propose to implement quantum computing based on electronic spin qubits by controlling the propagation of the electron wave packets through the helical edge states of quantum spi…
Shubnikov de Haas quantum oscillation of the surface states in the metallic Bismuth Telluride sheets
Taishi Chen, Junhao Han, Zhaoguo Li +8
Metallic Bi2Te3 crystalline sheets with the room-temperature resistivity of above 10 mΩ cm were prepared and their magnetoresistive transport was measured in a field of up to 9 Tes…