Scaling of the Coulomb Energy Due to Quantum Fluctuations in the Charge on a Quantum Dot

L. W. Molenkamp; Karsten Flensberg; M. Kemerink

doi:10.1103/PhysRevLett.75.4282

Scaling of the Coulomb Energy Due to Quantum Fluctuations in the Charge on a Quantum Dot

L. W. Molenkamp, Karsten Flensberg, and M. Kemerink

Phys. Rev. Lett. 75, 4282 – Published 4 December 1995

Abstract

The charging energy of a quantum dot is measured through the effect of its potential on the conductance of a second dot. This technique allows a measurement of the scaling of the dot's charging energy with the conductance of the tunnel barriers leading to the dot. We find that the charging energy scales quadratically with the reflection probability of the barriers. The observed power law agrees with a recent theory.

Received 27 March 1995

DOI:https://doi.org/10.1103/PhysRevLett.75.4282

Authors & Affiliations

L. W. Molenkamp^1,2, Karsten Flensberg^3,4, and M. Kemerink^1,*,†,‡

¹Philips Research Laboratories, 5656 AA Eindhoven, The Netherlands
²2. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, D-52056 Aachen, Germany
³Mikroelektronik Centret, Danmarks Tekniske Universitet, DK-2800 Lyngby, Denmark
⁴Dansk Institut for Fundamental Metrologi, Bygn. 307, Anker Engelundsvej 1, DK-2800 Lyngby, Denmark

^*Present address: Physics Department, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
^†Present and permanent address (L.W.M.).
^‡Present and permanent address (K.F.).