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次へ: junction a 上へ: an 1D chain with 戻る: an impurity interacting with

an impurity interacting with two atoms


\begin{displaymath}
H = \sum_{\langle ij \rangle } t c_i c_j + f d^+_0 d_0 +
( s c^+_0 d_0 + s c^+_1 d_0 +{\rm h.c.} )
\end{displaymath} (258)

The conductance of this model is calculated as
\begin{displaymath}
T= \frac{16 \Gamma _0^2 (s^2-ft+tw)^2}
{ \left( \Gamma _0^...
... -2 ft + f\omega -\Gamma _0\omega +2t \omega -w^2)^2 \right)
}
\end{displaymath} (259)

A position of a dip structure is not necessarily at $\omega =f$. The dip appears at $\omega =f-s^2/t$ in this case.



kino 平成18年4月17日