Publikation:

Measurement Back-Action in Stacked Graphene Quantum Dots

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2015

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Bischoff, Dominik
Eich, Marius
Rössler, Clemens
Ihn, Thomas
Ensslin, Klaus

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https://doi.org/10.1021/acs.nanolett.5b02167
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http://arxiv.org/abs/1602.08603

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Nano Letters. American Chemical Society (ACS). 2015, 15(9), pp. 6003-6008. ISSN 1530-6984. eISSN 1530-6992. Available under: doi: 10.1021/acs.nanolett.5b02167

Zusammenfassung

We present an electronic transport experiment in graphene where both classical and quantum mechanical charge detector back-action on a quantum dot are investigated. The device consists of two stacked graphene quantum dots separated by a thin layer of boron nitride. This device is fabricated by van der Waals stacking and is equipped with separate source and drain contacts to both dots. By applying a finite bias to one quantum dot, a current is induced in the other unbiased dot. We present an explanation of the observed measurement-induced current based on strong capacitive coupling and energy dependent tunneling barriers, breaking the spatial symmetry in the unbiased system. This is a special feature of graphene-based quantum devices. The experimental observation of transport in classically forbidden regimes is understood by considering higher-order quantum mechanical back-action mechanisms.

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530 Physik

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Graphene nanoribbon, van der Waals heterostructure, measurement back-action, charge detection, capacitively coupled double dot

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ISO 690BISCHOFF, Dominik, Marius EICH, Oded ZILBERBERG, Clemens RÖSSLER, Thomas IHN, Klaus ENSSLIN, 2015. Measurement Back-Action in Stacked Graphene Quantum Dots. In: Nano Letters. American Chemical Society (ACS). 2015, 15(9), pp. 6003-6008. ISSN 1530-6984. eISSN 1530-6992. Available under: doi: 10.1021/acs.nanolett.5b02167
BibTex
@article{Bischoff2015-09-09Measu-54936,
  year={2015},
  doi={10.1021/acs.nanolett.5b02167},
  title={Measurement Back-Action in Stacked Graphene Quantum Dots},
  number={9},
  volume={15},
  issn={1530-6984},
  journal={Nano Letters},
  pages={6003--6008},
  author={Bischoff, Dominik and Eich, Marius and Zilberberg, Oded and Rössler, Clemens and Ihn, Thomas and Ensslin, Klaus}
}
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