IFEG 20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Switchable coupling of vibrations to two-electron carbon-nanotube quantum dot states
Autor/es:
PETER WEBER; HERNAN L. CALVO; JULIAN BOHLE; KARIN GOSS; CAROLA MEYER; MAARTEN R. WEGEWIJS; CHRISTOPH STAMPFER
Revista:
NANO LETTERS (PRINT)
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington; Año: 2015 vol. 15 p. 4417 - 4422
ISSN:
1530-6984
Resumen:
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.
