Phys. Rev. Lett. 88, 076601 (2002) [4 pages]Transmission Phase of a Quantum Dot with Kondo Correlation near the Unitary LimitReceived 19 June 2001; published 31 January 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.076601
DOI:
10.1103/PhysRevLett.88.076601
PACS:
75.20.Hr, 72.15.Qm, 73.23.Hk
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