Abstract
A new mechanism of resonance Kondo tunneling via a composite quantum dot (QD) is proposed. It is shown that, owing to the hidden dynamic spin symmetry, the Kondo effect can be induced by a finite voltage eV applied to the contacts at an even number N of electrons in a QD with zero spin in the ground state. As an example, a double QD is considered in a parallel geometry with N = 2, which possesses the SO(4) type symmetry characteristic of a singlet-triplet pair. In this system, the Kondo peak of conductance appears at an eV value compensating for the exchange splitting.
Original language | English |
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Pages (from-to) | 366-370 |
Number of pages | 5 |
Journal | JETP Letters |
Volume | 77 |
Issue number | 7 |
DOIs | |
State | Published - 1 Dec 2003 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)