Scanning gate experiments: From strongly to weakly invasive probes

Steinacher, R. and Pöltl, C. and Krähenmann, T. and Hofmann, A. and Reichl, C. and Zwerger, W. and Wegscheider, W. and Jalabert, R. A. and Ensslin, K. and Weinmann, D. and Ihn, T.. (2018) Scanning gate experiments: From strongly to weakly invasive probes. Physical Review B, 98 (7). 075426.

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An open resonator fabricated in a two-dimensional electron gas is used to explore the transition from strongly invasive scanning gate microscopy to the perturbative regime of weak tip-induced potentials. With the help of numerical simulations that faithfully reproduce the main experimental findings, we quantify the extent of the perturbative regime in which the tip-induced conductance change is unambiguously determined by properties of the unperturbed system. The correspondence between the experimental and numerical results is established by analyzing the characteristic length scale and the amplitude modulation of the conductance change. In the perturbative regime, the former is shown to assume a disorder-dependent maximum value, while the latter linearly increases with the strength of a weak tip potential.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Quantum Computing with Semiconductors (Hofmann)
UniBasel Contributors:Hofmann, Andrea
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:25 Jan 2022 16:01
Deposited On:25 Jan 2022 16:01

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