News & Views |
Featured
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Article |
A coherent nanomechanical oscillator driven by single-electron tunnelling
In a nanobeam that is strongly coupled to a single-electron transistor, electron tunnelling back-action induces self-sustaining mechanical oscillations. This oscillator can be compared to a phonon laser and can be stabilized.
- Yutian Wen
- , N. Ares
- & E. A. Laird
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News & Views |
Perfect mismatch
The electronic coupling between two stacked atomic layers is usually weak if their periodicities are incommensurate. Optical absorption experiments have now revealed unexpectedly strong interlayer coupling in incommensurate double-walled carbon nanotubes.
- João Lopes dos Santos
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Letter |
Van der Waals-coupled electronic states in incommensurate double-walled carbon nanotubes
Two concentric carbon nanotubes don’t need to have a common finite unit cell. Absorption spectra of such incommensurate double-walled carbon nanotubes reveal strong hybridization of the electron wavefunctions — unusual for van der Waals-coupled structures. The observations can be rationalized by zone folding the electronic structure of twisted-and-stretched graphene bilayers.
- Kaihui Liu
- , Chenhao Jin
- & Feng Wang
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Article |
Real-space tailoring of the electron–phonon coupling in ultraclean nanotube mechanical resonators
A mechanism for coupling the electrons and vibrational motion of a suspended carbon nanotube is now demonstrated. Tailoring the coupling between specific electronic and phononic modes by controlling the position of quantum dots along the resonating tube enables spatial imaging of the mode shape.
- A. Benyamini
- , A. Hamo
- & S. Ilani
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Article |
Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube
A Wigner molecule—a localized pair of interacting electrons—is now created in a carbon nanotube. The high-quality, electronically pristine tubes enable a full characterization of the energy spectrum, laying the groundwork for future studies of interacting fermion systems in one and two dimensions.
- S. Pecker
- , F. Kuemmeth
- & S. Ilani
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