Transmission Phase of a Quantum Dot with Kondo Correlation near the Unitary Limit
Abstract
The complex transmission amplitude of a quantum dot (QD) with Kondo correlation was measured near the unitary limit. The transmission phase was observed to evolve almost linearly over a range of about 1.5π when the Fermi energy was scanned through a spin degenerate energy level of the QD. Surprisingly, the phase in the Coulomb Blockade regime, with one more electron entering the dot, was strongly affected by a preexistence of Kondo correlation. These results suggest that a full explanation of the Kondo effect may go beyond the framework of the Anderson model.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2002
- DOI:
- 10.1103/PhysRevLett.88.076601
- arXiv:
- arXiv:cond-mat/0106469
- Bibcode:
- 2002PhRvL..88g6601J
- Keywords:
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- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 pages, 4 figures