Transmission Phase Shift of a Quantum Dot with Kondo Correlations

Details Transmission Phase Shift of a Quantum Dot with Kondo Correlations Transmission Phase Shift of a Quantum Dot with Kondo Correlations

1999-09-28

arxiv.org/abs/cond-mat/9909401v2

Phys. Rev. Lett. 84, 3710 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages Revtex, 4 figures, final published version

Scientific paper

10.1103/PhysRevLett.84.3710

We study the effects of Kondo correlations on the transmission phase shift of a quantum dot in an Aharonov-Bohm ring. We predict in detail how the development of a Kondo resonance should affect the dependence of the phase shift on transport voltage, gate voltage and temperature. This system should allow the first direct observation of the well-known scattering phase shift of pi/2 expected (but not directly measurable in bulk systems) at zero temperature for an electron scattering off a spin-1/2 impurity that is screened into a singlet.

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