Polaronic transport through DNA molecules

• Autorzy: Sidowski M. , Walczak K.
• Konferencja: Conference New Materials for Magnetoelectronics, Będlewo, 3-6 May 2006
• Języki publikacji: EN

Abstrakty

EN

We present results of theoretical studies on polaronic and incoherent transport through a DNA-based junction. Decoherence itself is modelled through the use of an imaginary dephasing potential. Nonperturbative computational scheme, used in this work, is based on Green's functions within the framework of the so-called polaron transformation (GFT-PT). This method maps exactly the many-body hole -phonon interaction problem into a one-body multi-channel scattering problem, where the availability of particular conduction channels is determined by an appropriate weight factor. The results obtained for poly(dG)-poly(dC) DNA molecule reveal saturation effect of the current at high voltages, where for short chains we establish an exponential DNA length dependence. Besides, we document strong coupling and exponential dephasing dependences of the maximum current.

Słowa kluczowe

EN

polaronic transport; DNA-based device; DNA electronics; decoherence

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2007
• Tom: Vol. 25, No. 2
• Strony: 577--582
• Opis fizyczny: Bibliogr. 18 poz.

Twórcy

autor

Sidowski M.

autor

Walczak K.

• Institute of Physics, Adam Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland

Bibliografia

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