By combining resonant tunneling spectra with capacitance-voltage (C-V) characteristics under photo-excitation, we have developed photo-excited, capacitance-sensitive resonant tunneling spectrum (PC-RTS) for probing th...By combining resonant tunneling spectra with capacitance-voltage (C-V) characteristics under photo-excitation, we have developed photo-excited, capacitance-sensitive resonant tunneling spectrum (PC-RTS) for probing the quantized levels of quantum wells in valence band. Inter-well tunneling events have been identified and are in good agreement with the calculated level scheme in the valence band of a quantum well-barrier-quantum well heterostructure. Compared to conventional resonant tunneling spectrum, our method shows remarkable advantages in higher sensitivity for discriminating electronic structures.展开更多
基金supported by the National Basic Research Program of China (Grant No. 2011CB932901)
文摘By combining resonant tunneling spectra with capacitance-voltage (C-V) characteristics under photo-excitation, we have developed photo-excited, capacitance-sensitive resonant tunneling spectrum (PC-RTS) for probing the quantized levels of quantum wells in valence band. Inter-well tunneling events have been identified and are in good agreement with the calculated level scheme in the valence band of a quantum well-barrier-quantum well heterostructure. Compared to conventional resonant tunneling spectrum, our method shows remarkable advantages in higher sensitivity for discriminating electronic structures.
