期刊
NATURE NANOTECHNOLOGY
卷 9, 期 10, 页码 808-813出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2014.187
关键词
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资金
- European Research Council
- EC-FET European Graphene Flagship
- Engineering and Physical Sciences Research Council (UK)
- Leverhulme Trust (UK)
- Royal Society
- US Office of Naval Research
- US Air Force Office of Scientific Research
- US Army Research Office
- RS-RFBR
- Russian Federation [14-02-00792, 13-02-92612]
- Global Research Lab Program through the National Research Foundation of Korea - Ministry of Science, ICT Future, Korea [2011-0021972]
- EPSRC [EP/K005014/1, EP/K031082/1, EP/M013294/1, EP/G035954/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G035954/1, EP/M013294/1, 1240086, EP/K031082/1, EP/K005014/1] Funding Source: researchfish
Recent developments in the technology of van der Waals heterostructures(1,2) made from two-dimensional atomic crystals(3,4) have already led to the observation of new physical phenomena, such as the metal-insulator transitions and Coulomb drags, and to the realization of functional devices, such as tunnel diodes(7,8), tunnel transistors(9,10) and photovoltaic sensors(11). An unprecedented degree of control of the electronic properties is available not only by means of the selection of materials in the stack(12), but also through the additional fine-tuning achievable by adjusting the built-in strain and relative orientation of the component layers(13-17). Here we demonstrate how careful alignment of the crystallographic orientation of two graphene electrodes separated by a layer of hexagonal boron nitride in a transistor device can achieve resonant tunnelling with conservation of electron energy, momentum and, potentially, chirality. We show how the resonance peak and negative differential conductance in the device characteristics induce a tunable radiofrequency oscillatory current that has potential for future high-frequency technology.
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