Quantum dots with even number of electrons: Kondo effect in a finite magnetic field

Details Quantum dots with even number of electrons: Kondo effect in a finite magnetic field Quantum dots with even number of electrons: Kondo effect in a finite magnetic field

1999-07-31

arxiv.org/abs/cond-mat/9908004v2

Phys. Rev. Lett. 84, 1756 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.84.1756

We study a small spin-degenerate quantum dot with even number of electrons, weakly connected by point contacts to the metallic electrodes, and subject to an external magnetic field. If the Zeeman energy B is equal to the single-particle level spacing $\Delta $ in the dot, the ground state of the dot becomes doubly degenerate, and the system exhibits Kondo effect, despite the fact that B exceeds by far the Kondo temperature $T_{K}$. A possible realization of this in tunneling experiments is discussed.

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