Many-neighbor treatment of molecular-switch transmission

We use the many-neighbor description of a monoatomic chain with a single impurity, characterized by long-range couplings, to study the electron transmission properties of a conducting polymer. The transmission probability is obtained by a method based on the Lippmann-Schwinger equation. Control of t...

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Bibliographic Details
Published in:Chemical physics letters 1996-10, Vol.260 (5), p.647-652
Main Authors: Mišković, Z.L., English, R.A., Davison, S.G., Goodman, F.O.
Format: Article
Language:English
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Summary:We use the many-neighbor description of a monoatomic chain with a single impurity, characterized by long-range couplings, to study the electron transmission properties of a conducting polymer. The transmission probability is obtained by a method based on the Lippmann-Schwinger equation. Control of the switch operation is facilitated by the presence of a peak in the transmission probability at the impurity site energy for sufficiently weak impurity-chain coupling. We show that this peak becomes rather distorted, when long-range coupling is present in the chain, and provides a more convenient means of switch control.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(96)00942-6