Magnetic field-induced Kondo effects in Coulomb blockade systems

Details Magnetic field-induced Kondo effects in Coulomb blockade systems Magnetic field-induced Kondo effects in Coulomb blockade systems

2000-10-22

arxiv.org/abs/cond-mat/0010336v1

Lecture Notes in Physics, 579, 3 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We review the peculiarities of transport through a quantum dot caused by the spin transition in its ground state. Such transitions can be induced by a magnetic field. Tunneling of electrons between the dot and leads mixes the states belonging to the ground state manifold of the dot. Unlike the conventional Kondo effect, this mixing, which occurs only at the singlet-triplet transition point, involves both the orbital and spin degrees of freedom of the electrons. We present theoretical and experimental results that demonstrate the enhancement of the conductance through the dot at the transition point.

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