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Regensburg 2002 – scientific programme

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HL: Halbleiterphysik

HL 5: Quantenpunkte und -dr
ähte: Transporteigensch. I

HL 5.4: Talk

Monday, March 11, 2002, 11:15–11:30, H17

Coulomb blockade in a one-dimensional quantum qot — •T. Kleimann1, M. Sassetti1, and B. Kramer21Dipartimento di Fisica, INFM, Via Dodecaneso 33, I-16146 Genova — 2I. Inst. Theor. Physik, Universität Hamburg, Jungiusstr. 9, D-20355 Hamburg

We calculate the temperature dependence of Coulomb blockade peaks in transport through a one dimensional quantum dot in a quantum wire [1,2]. The interaction is described in terms of the Luttinger liquid theory. We assume a varying interaction strength along the system with a maximum at the dot position. We find that the temperature dependence of the shape of the Coulomb peaks obeys a power law which shows a crossover due to the inhomogeneity of the interaction strength. While charging energy and level spacing of the quantum dot arise from the local interaction strength the conductance in the Coulomb blockade regime is affected by the entire interaction landscape along the system [3].

[1] O. M. Auslaender et al., Phys. Rev. Lett. 84, 1764 (2000)

[2] T. Kleimann, M. Sassetti, B. Kramer and A. Yacoby, Phys. Rev. B 62, 8144 (2000)

[3] T. Kleimann, M. Sassetti and B. Kramer, Proceedings of MB11 2001, to be published in Advances in Quantum Many-Body Theory

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