Abstract
The influence of excited levels on nonlinear transport properties of a quantum dot weakly coupled to leads is studied using a master-equation approach. A charging model for the dot is compared with a quantum mechanical model for interacting electrons. The currentvoltage curve shows Coulomb lockade and additional finestructure that is related to the excited states of the correlated electrons. Unequal coupling to the leads causes asymmetric conductance peaks. Negative differential conductances are predicted due to the existence of excited states with different spins.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Meirav, U., Kastner, M.A., Wind, S.J.: Phys. Rev. Lett.65, 771 (1990); Kastner, M.A.: Rev. Mod. Phys.64, 849 (1992)
Johnson, A.T., Kouwenhoven, L.P., Jong de, W., Vaart, N.C. van der, Harmans, C.J.P.M., Foxon, C.T.: Phys. Rev. Lett.69, 1592 (1992)
Weis, J., Haug, R.J., Klitzing, K.v., Ploog, K., Phys. Rev. B46, 12837 (1992)
Weinmann, D., Häusler, W., Pfaff, W., Kramer, B., Weiss, U.: Europhys. Lett.26, 467 (1994)
Kinaret, J.M., et al.: Phys. Rev. B46, 4681 (1992)
Averin, D.V., Korotkov, A.N.: J. Low Temp. Phys.80, 173 (1990)
Averin, D.V., Korotkov, A.N.: Likharev, K.K.: Phys. Rev. B44, 6199 (1991)
Beenakker, C.W.J.: Phys. Rev. B44, 1646 (1991)
Averin, D.V., Odintsov, A.A.: Phys. Lett. A140, 251 (1989);
Averin, D.V., Nazarov, Yu.V.: In: Single charge tunneling. Grabert, H., Devoret, M.H. (eds.) New York: Plenum Press 1991
The linear correction to the Gibbs distribution calculated in [8] vanishes for the case shown in Fig. 2
Meir, Y., Wingreen, N.S., Lee, P.A.: Phys. Rev. Lett.66, 3048 (1991)
Foxman, E.B. et al.: Phys. Rev. B47, 10020 (1993)
Vaart van der, N.C., Johnson, A.T., Kouwenhoven, L.P., Maas, D.J., Jong de, W., de Ruyter van Stevenick, M.P., Enden, van der A., Harmans, C.J.P.M.: Physica B189, 99 (1993)
Fal'ko, V.I.: Europhys. Lett.,8, 785 (1989)
Häusler, W., Kramer, B., Mašek, J.: Z. Phys. B85, 435 (1991);
Häusler, W., Kramer, B.: Phys. Rev. B47, 16353 (1993)
Brandes, T., Häusler, W., Jauregui, K., Kramer, B., Weinmann, D.: Physica B189, 16 (1993)
Jauregui, K., Häusler, W., Kramer, B.: Europhys. Lett.24, 581 (1993)
Häusler, W.: (Preprint 1994)
Weis, J., Haug, R.J., Klitzing v., K., Ploog, K.: Phys. Rev. Lett.71, 4019 (1993)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Pfaff, W., Weinmann, D., Häusler, W. et al. Nonlinear transport properties of quantum dots. Z. Physik B - Condensed Matter 96, 201–206 (1994). https://doi.org/10.1007/BF01313284
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01313284