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19 April 2024 |
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Article overview
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Evidence for Charging Effects in CdTe/CdMgTe Quantum Point Contacts | | M. Czapkiewicz
; V. Kolkovsky
; P. Nowicki
; M. Wiater
; T. Wojciechowski
; T. Wojtowicz
; J. Wróbel
; | | Date: |
13 Mar 2012 | | Abstract: | 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. | | Source: | arXiv, 1203.2843 | | Services: | Forum | Review | PDF | Favorites | |
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