Hysteretic capacitance-voltage characteristics of self-assembled quantum dots far from equilibrium with their environment

Schnorr, L. and Khoukhi, O. and Berg, L. and Heinzel, T. and Rothfuchs-Engels, C. and Scholz, S. and Ludwig, Ar. and Wieck, A.D.

Volume: 104 Pages:
DOI: 10.1103/PhysRevB.104.205310
Published: 2021

Capacitance-voltage measurements on self-assembled quantum dot layers exposed to strong electric fields and with large distances to the reservoirs show a marked hysteretic behavior. It is shown that at low temperatures this hysteresis can be explained quantitatively in terms of state-dependent capture and emission rates that are obtained by a rate equation model, applied to the measured capacitance transients. The occupation dynamics and the steady-state configuration can be extracted from these data via a Markov chain model. © 2021 American Physical Society.

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