%0 Journal Article
%T Evidence for Charging Effects in CdTe/CdMgTe Quantum Point Contacts
%A M. Czapkiewicz
%A V. Kolkovsky
%A P. Nowicki
%A M. Wiater
%A T. Wojciechowski
%A T. Wojtowicz
%A J. Wr¨®bel
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevB.86.165415
%X Here we report on fabrication and low temperature magnetotransport measurements of quantum point contacts patterned from a novel two-dimensional electron system - CdTe/CdMgTe modulation doped heterostructure. From the temperature and bias dependence we ascribe the reported data to evidence for a weakly bound state which is naturally formed inside a CdTe quantum constrictions due to charging effects. We argue that the spontaneous introduction of an open dot is responsible for the replacement of flat conductance plateaus by quasi-periodic resonances with amplitude less than 2e^{2}/h, as found in our system. Additionally, below 1 K a pattern of weaker conductance peaks, superimposed upon wider resonances, is also observed.
%U http://arxiv.org/abs/1203.2843v2