Journal
NANO LETTERS
Volume 15, Issue 7, Pages 4417-4422Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b00765
Keywords
Carbon nanotube; quantum dot; electron transport; nanoelectromechanical systems (NEMS); electron-phonon coupling in low-dimensional structures; spin states
Categories
Funding
- Helmholtz Nanoelectronic Facility (HNF)
- JARA Seed Fund
- DFG [SPP-1243, FOR912]
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We report transport measurements on a quantum dot in a partly suspended carbon nanotube. Electrostatic tuning allows us to modify and even switch on and off' the coupling to the quantized stretching vibration across several charge states. The magnetic-field dependence indicates that only the two-electron spin-triplet excited state couples to the mechanical motion, indicating mechanical coupling to both the valley degree of freedom and the exchange interaction, in contrast to standard models.
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