Kondo correlations and the Fano effect in closed Aharonov-Bohm interferometers.
作者： Walter Hofstetter , Jürgen König , Herbert Schoeller
DOI: 10.1103/PHYSREVLETT.87.156803
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摘要: We study the Fano-Kondo effect in a closed Aharonov-Bohm (AB) interferometer which contains single-level quantum dot and predict frequency doubling of AB oscillations as signature Kondo-correlated states. Using Keldysh formalism, Friedel sum rule, numerical renormalization group, we calculate exact zero-temperature linear conductance G function phase phi level position epsilon. In unitary limit, G(phi) reaches its maximum 2e(2)/h at = pi/2. find Fano-suppressed Kondo plateau for G(epsilon) similar to recent experiments.
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