Suppression of Self-sustained Field Domain Oscillation in GaAs/AlAs Superlattice by Hydrostatic Pressure at Room Temperature
WU Jian-qing, LIU Zhen-xing1, JIANG De-sheng, SUN Bao-quan
National Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
1Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Suppression of Self-sustained Field Domain Oscillation in GaAs/AlAs Superlattice by Hydrostatic Pressure at Room Temperature
National Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
1Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： The behavior of room temperature self-sustained current oscillations resulting from sequential resonance tunneling in a doped weakly-coupled GaAs/AlAs superlattice (SL) is investigated under hydrostatic pressure. From atmosphere pressure to 6.5 kbar, oscillations exist in the whole plateau of the I-V curve and oscillating characteristics are affected by the pressure. When hydrostatic pressure is higher than 6.5 kbar, the current oscillations are completely suppressed although a current plateau still can be seen in the 1-V curve. The plateau disappears when the pressure is close to 13.5kbar. As the main effect of hydrostatic pressure is to lower the X point valley with respect to Г point valley, the disappearance of oscillation and the plateau shrinkage before Г - X resonance takes place are attributed to the increases of thermoionic emission and nonresonant tunneling components determined by the lowest Г - X barrier height in GaAs/AlAs SL structure.
(Low-field transport and mobility; piezoresistance)
引用本文:
WU Jian-qing;LIU Zhen-xing;JIANG De-sheng;SUN Bao-quan. Suppression of Self-sustained Field Domain Oscillation in GaAs/AlAs Superlattice by Hydrostatic Pressure at Room Temperature[J]. 中国物理快报, 1999, 16(2): 143-145.
WU Jian-qing, LIU Zhen-xing, JIANG De-sheng, SUN Bao-quan. Suppression of Self-sustained Field Domain Oscillation in GaAs/AlAs Superlattice by Hydrostatic Pressure at Room Temperature. Chin. Phys. Lett., 1999, 16(2): 143-145.
1999, Vol. 16 
