| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Realizations, Characterizations, and Manipulations of Two-Dimensional Electron Systems Floating above Superfluid Helium Surfaces |
| Haoran Wei1,3†, Mengmeng Wu2†, Renfei Wang2, Mingcheng He1,3, Hiroki Ikegami1, Yang Liu2*, and Zhi Gang Cheng1,3,4* |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2International Center for Quantum Materials, Peking University, Beijing 100871, China
3School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
4Songshan Lake Materials Laboratory, Dongguan 523808, China
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| Cite this article: |
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Haoran Wei, Mengmeng Wu, Renfei Wang et al 2023 Chin. Phys. Lett. 40 127301 |
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Abstract Electron systems in low dimensions are enriched with many superior properties for both fundamental research and technical developments. Wide tunability of electron density, high mobility of motion, and feasible controllability in microscales are the most prominent advantages that researchers strive for. Nevertheless, it is always difficult to fulfill all in one solid-state system. Two-dimensional electron systems (2DESs) floating above the superfluid helium surfaces are thought to meet these three requirements simultaneously, ensured by the atomic smoothness of surfaces and the electric neutrality of helium. Here we report our recent work in preparing, characterizing, and manipulating 2DESs on superfluid helium. We realized a tunability of electron density over one order of magnitude and tuned their transport properties by varying electron distribution and measurement frequency. The work we engage in is crucial for advancing research in many-body physics and for development of single-electron quantum devices rooted in these electron systems.
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Received: 01 November 2023
Editors' Suggestion
Published: 11 December 2023
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| PACS: |
05.30.Fk
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(Fermion systems and electron gas)
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67.25.-k
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(4He)
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73.61.-r
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(Electrical properties of specific thin films)
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