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Negative conductance patterns of quantum dots: experiment and theory (Articolo in rivista)

Type

Label

Negative conductance patterns of quantum dots: experiment and theory (Articolo in rivista) (literal)

Anno

Alternative label

Rogge, MC; Cavaliere, F; Sassetti, M; Haug, RJ; Kramer, B (2006)
Negative conductance patterns of quantum dots: experiment and theory
in New journal of physics
(literal)

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Rivista

Note

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Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany; Univ Hamburg, Inst Theoret Phys, D-20355 Hamburg, Germany; Univ Genoa, Dipartimento Fis, CNR Lamia, INFM, I-16146 Genoa, Italy; Int Univ Bremen, D-28759 Bremen, Germany (literal)

Titolo

Abstract

Experimental results for the sequential transport through a lateral quantum dot in a perpendicular magnetic field are compared with theory. Regular patterns of negative differential conductances are observed in the nonlinear regime. We attempt to reproduce theoretically these patterns in a simplified model which captures the essential features of the experimental system. Orbital and spin effects are treated in terms of the Fock-Darwin model. The transport properties are described by employing a master equation with tunable tunnelling and relaxation rates. We show that the essential physics underlying the experiment can be described within our approach if the timescales of the different transport channels are well separated. (literal)

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