Negative differential resistance in a one-dimensional molecular wire with odd number of atoms |
| |
Authors: | S Lakshmi Swapan K Pati |
| |
Institution: | (1) Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., 560 064 Bangalore, India |
| |
Abstract: | We have investigated the effects of electron-phonon coupling on the current-voltage characteristics of a one-dimensional molecular
wire with odd number of atoms. The wire has been modelled using the Su-Schreiffer-Heeger (SSH) Hamiltonian and the current-voltage
characteristics have been obtained using the Landauer’s formalism. In the presence of strong electron-lattice coupling, we
find that there are regions of negative differential resistance (NDR) at some critical bias, due to the degeneracy in the
energies of the frontier molecular orbitals. The presence of the applied bias and the electron-lattice coupling results in
the delocalization of these low-lying molecular states leading to the NDR behaviour. |
| |
Keywords: | Molecular wire electron-phonon Su-Schreiffer-Heeger Hamiltonian Landauer Newns-Anderson |
本文献已被 SpringerLink 等数据库收录! |