Giant, Voltage Tuned, Quality Factors of Single Wall Carbon Nanotubes and Graphene at Room Temperature - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue Nano Letters Année : 2019

Giant, Voltage Tuned, Quality Factors of Single Wall Carbon Nanotubes and Graphene at Room Temperature

Résumé

Mastering dissipation in graphene-based nanostructures is still the major challenge in most fundamental and technological exploitations of these ultimate mechanical nanoresonators. Although high quality factors have been measured for carbon nanotubes (>10$^6$) and graphene (>10$^5$) at cryogenic temperatures, room-temperature values are orders of magnitude lower (≃10$^2$). We present here a controlled quality factor increase of up to ×10$^3$ for these basic carbon nanostructures when externally stressed like a guitar string. Quantitative agreement is found with theory attributing this decrease in dissipation to the decrease in viscoelastic losses inside the material, an effect enhanced by tunable ”soft clamping”. Quality factors exceeding 25 000 for SWCNTs and 5000 for graphene were obtained on several samples, reaching the limits of the graphene material itself. The combination of ultralow size and mass with high quality factors opens new perspectives for atomically localized force sensing and quantum computing as the coherence time exceeds state-of-the-art cryogenic devices.
Fichier non déposé

Dates et versions

hal-02285867 , version 1 (13-09-2019)

Identifiants

Citer

A. Descombin, Philippe Poncharal, A. Pascale-Hamri, M. Choueib, R. Diehl, et al.. Giant, Voltage Tuned, Quality Factors of Single Wall Carbon Nanotubes and Graphene at Room Temperature. Nano Letters, 2019, 19 (3), pp.1534-1538. ⟨10.1021/acs.nanolett.8b04282⟩. ⟨hal-02285867⟩
27 Consultations
14 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More