Inelastic quantum transport in a ladder model: Implications for DNA conduction and comparison to experiments on suspended DNA oligomers
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
We investigate quantum transport characteristics of a ladder model, which effectively mimics the topology of a double-stranded DNA molecule. We consider the interaction of tunneling charges with a selected internal vibrational degree of freedom and discuss its influence on the structure of the current-voltage characteristics. Further, molecule-electrode contact effects are shown to dramatically affect the orders of magnitude of the current. Recent electrical transport measurements on suspended DNA oligomers with a complex base-pair sequence, revealing strikingly high currents, are also presented and used as a reference point for the theoretical modeling. A semiquantitative description of the measured I-V curves is achieved, suggesting that the coupling to vibrational excitations plays an important role in DNA conduction.
Details
Originalsprache | Englisch |
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Aufsatznummer | 235105 |
Seitenumfang | 10 |
Fachzeitschrift | Physical Review B |
Jahrgang | 74 |
Ausgabenummer | 23 |
Publikationsstatus | Veröffentlicht - Dez. 2006 |
Peer-Review-Status | Ja |
Extern publiziert | Ja |
Externe IDs
Scopus | 33845386325 |
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ORCID | /0000-0001-8121-8041/work/142240849 |
Schlagworte
Schlagwörter
- Charge-transport, Electrical-transport, Electronic states, Long-range, Molecules, Single, Poly(da)-poly(dt), Poly(dg)-poly(dc), Localization, Wire