Time-Resolved Tunneling of Single Electrons between Landau Levels in a Quantum Dot

N. C. van der Vaart; M. P. de Ruyter van Steveninck; L. P. Kouwenhoven; A. T. Johnson; Y. V. Nazarov; C. J. P. M. Harmans; C. T. Foxon

doi:10.1103/PhysRevLett.73.320

Time-Resolved Tunneling of Single Electrons between Landau Levels in a Quantum Dot

N. C. van der Vaart, M. P. de Ruyter van Steveninck, L. P. Kouwenhoven, A. T. Johnson, Y. V. Nazarov, C. J. P. M. Harmans, and C. T. Foxon

Phys. Rev. Lett. 73, 320 – Published 11 July 1994

Abstract

We have investigated Coulomb blockade oscillations in a quantum dot with two confined Landau levels. Some oscillations show switching between two discrete conductance values as a function of time. We show that these switches are due to single electron tunnel events between the two Landau levels. Upon increasing the magnetic field, we find that the time between two tunnel events reaches macroscopic values on the order of 100 s.

Received 21 March 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.320

Authors & Affiliations

N. C. van der Vaart, M. P. de Ruyter van Steveninck, L. P. Kouwenhoven^*, A. T. Johnson^†, Y. V. Nazarov, and C. J. P. M. Harmans

Department of Applied Physics, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands

C. T. Foxon^‡

Philips Research Laboratories, Redhill, Surrey RH15HA, United Kingdom

^*Present address: Lawrence Berkeley Laboratories, Mail stop 2-200, Berkeley, CA 94720.
^†Present address: David Rittenhouse Laboratory, Department of Physics, University of Pennsylvania, Philadelphia, PA 19014.
^‡Present address: Department of Physics, University of Nottingham, Nottingham NG72RD, United Kingdom.