期刊
PHYSICAL REVIEW LETTERS
卷 84, 期 16, 页码 3710-3713出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.3710
关键词
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We study the effects of Kondo correlations on the transmission phase shift uf 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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