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Volumn 81, Issue 12, 2010, Pages

Two-impurity Anderson model revisited: Competition between Kondo effect and reservoir-mediated superexchange in double quantum dots

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EID: 77955164078     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.81.121311     Document Type: Article
Times cited : (21)

References (34)
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    • The conductance plateau for large t in Fig. is due to one-electron S=1/2 Kondo effect. The one-electron even-orbital state is lowered below the two-electron states when t≳ |ε|. Hence the conductance plateau is attributed to the formation of a single-impurity Kondo state in the even channel, and the conductance therefore reaches the unitary limit at zero temperature, independent of the value of t/Γ.
    • The conductance plateau for large t in Fig. is due to one-electron S = 1 / 2 Kondo effect. The one-electron even-orbital state is lowered below the two-electron states when t ≳ | ε |. Hence the conductance plateau is attributed to the formation of a single-impurity Kondo state in the even channel, and the conductance therefore reaches the unitary limit at zero temperature, independent of the value of t / Γ.
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    • Explicit expression for JI (U) will be given elsewhere.
    • Explicit expression for J I (U) will be given elsewhere.


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