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Magnetic field-induced Kondo effects in Coulomb blockade systems
M. Pustilnik, L. I. Glazman, D. H. Cobden +1
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…
The Kondo Effect in the Unitary Limit
W. G. van der Wiel, S. De Franceschi, T. Fujisawa +3
We observe a strong Kondo effect in a semiconductor quantum dot when a small magnetic field is applied. The Coulomb blockade for electron tunneling is overcome completely by the Ko…
Inelastic tunneling in a double quantum dot coupled to a bosonic environment
Toshimasa Fujisawa, Wilfred G. van der Wiel, Leo P. Kouwenhoven
Coupling a quantum system to a bosonic environment always give rise to inelastic processes, which reduce the coherency of the system. We measure energy dependent rates for inelasti…
Electron Cotunneling in a Semiconductor Quantum Dot
S. De Franceschi, S. Sasaki, J. M. Elzerman +3
We report transport measurements on a semiconductor quantum dot with a small number of confined electrons. In the Coulomb blockade regime, conduction is dominated by cotunneling pr…
Kondo effect in an integer-spin quantum dot
S. Sasaki, S. De Franceschi, J. M. Elzerman +4
The Kondo effect is a key many-body phenomenon in condensed matter physics. It concerns the interaction between a localised spin and free electrons. Discovered in metals containing…
Direct Coulomb and Exchange Interaction in Artificial Atoms
S. Tarucha, D. G. Austing, Y. Tokura +2
We determine the contributions from the direct Coulomb and exchange interactions to the total interaction in semiconductor artificial atoms. We tune the relative strengths of the t…