Figure 2From: A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum DotsDifference between the upwards- (G up) and downwards-scan (G down) of the hysteresis measurement for a scan time of 200 ms in Fig. 1. The signature of the s- and p-states of the self-assembled QDs confirms that the observed hysteresis is due to electron storage inside the QD states and not to defect/interface statesBack to article page