Temperature and magnetic-field dependence of the quantum corrections to the conductance of a network of quantum dots

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Joern N. Kupferschmidt and Piet W. Brouwer
Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501, USA and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität, 80333 München, Germany

Received 14 May 2008; published 11 September 2008

Wecalculate the magnetic-field and temperature dependence of all quantum correctionsto the ensemble-averaged conductance of a network of quantum dots.We consider the limit that the dimensionless conductance of thenetwork is large, so that the quantum corrections are smallin comparison to the leading, classical contribution to the conductance.For a quantum dot network the conductance and its quantumcorrections can be expressed solely in terms of the conductancesand form factors of the contacts and the capacitances ofthe quantum dots. In particular, we calculate the temperature dependenceof the weak localization correction and show that it isdescribed by an effective dephasing rate proportional to temperature.

URL:	http://link.aps.org/doi/10.1103/PhysRevB.78.125313
DOI:	10.1103/PhysRevB.78.125313
PACS:	73.23.-b; 05.45.Mt; 73.20.Fz 73.23.-b Electronic transport in mesoscopic systems 05.45.Mt Quantum chaos; semiclassical methods 73.20.Fz Weak or Anderson localization (surface/interface states) YEAR: 2008
KEYWORDS:	magnetic fields, quantum dots, thermoelectricity, weak localisation

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