| Original Articles |
|
|
|
|
Transport Properties in a One-Dimensional Chain with Randomly Side-Coupled Impurities |
| HU Dong-Sheng;ZHANG Gui-Ping;XIONG Shi-Jie |
| Department of Physics, Nanjing University, Nanjing 210093 |
|
| Cite this article: |
|
HU Dong-Sheng, ZHANG Gui-Ping, XIONG Shi-Jie 2002 Chin. Phys. Lett. 19 1850-1852 |
|
|
|
|
Abstract We investigate the transport properties of a one-dimensional (1D) chain with randomly side-coupled impurities. By using the transfer matrix technique, we present numerical results of the transmission coefficient as a function of the electron energy. It is found that an extended state will be shown in such a random 1D system if the impurities are side-coupled to the chain with not only the nearest-neighbouring bonds but also the next-nearest-neighbouring-bonds. We present an analytic expression for the energy of this extended state, which is determined by the strength of the nearest and next-nearest couplings between the impurities and the chain. The obtained results can be used to explain the transport properties of DNA chains and other quasi-1D organic structures.
|
| Keywords:
72.10.Fk
72.80.Ng
72.80.Le
|
|
|
Published: 01 December 2002
|
|
| PACS: |
72.10.Fk
|
(Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))
|
| |
72.80.Ng
|
(Disordered solids)
|
| |
72.80.Le
|
(Polymers; organic compounds (including organic semiconductors))
|
|
|
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
