Disorder-Mediated Electron Valley Resonance in Carbon Nanotube Quantum Dots

András Pályi and Guido Burkard
Phys. Rev. Lett. 106, 086801 – Published 23 February 2011

Abstract

We propose a scheme for coherent rotation of the valley isospin of a single electron confined in a carbon nanotube quantum dot. The scheme exploits the ubiquitous atomic disorder of the nanotube crystal lattice, which induces time-dependent valley mixing as the confined electron is pushed back and forth along the nanotube axis by an applied ac electric field. Using experimentally determined values for the disorder strength we estimate that valley Rabi oscillations with a period on the nanosecond time scale are feasible. The valley resonance effect can be detected in the electric current through a double quantum dot in the single-electron transport regime.

  • Figure
  • Figure
  • Figure
  • Received 19 October 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.086801

© 2011 American Physical Society

Authors & Affiliations

András Pályi1,2 and Guido Burkard1

  • 1Department of Physics, University of Konstanz, D-78457 Konstanz, Germany
  • 2Department of Materials Physics, Eötvös University Budapest, H-1517 Budapest POB 32, Hungary

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 106, Iss. 8 — 25 February 2011

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×