Molecular transistor coupled to phonons and Luttinger-liquid leads
arXiv:cond-mat/0412710 · doi:10.1103/PhysRevB.72.075337
Abstract
We study the effects of electron-phonon interactions on the transport properties of a molecular quantum dot coupled to two Luttinger-liquid leads. In particular, we investigate the effects on the steady state current and DC noise characteristics. We consider both equilibrated and unequilibrated on-dot phonons. The density matrix formalism is applied in the high temperature approximation and the resulting semi-classical rate equation is numerically solved for various strengths of electron-electron interactions in the leads and electron-phonon coupling. The current and the noise are in general smeared out and suppressed due to intralead electron interaction. On the other hand, the Fano factor, which measures the noise normalized by the current, is more enhanced as the intralead interaction becomes stronger. As the electron-phonon coupling becomes greater than order one, the Fano factor exhibits super-Poissonian behaviour.
11 pages, 11 figures
References in corpus (9)
- Measurement of the conductance of a hydrogen molecule
- Phonon effects in molecular transistors: Quantum and classical treatment
- Bosonization for Beginners --- Refermionization for Experts
- Vibrational sidebands and dissipative tunneling in molecular transistors
- Influence of nano-mechanical properties on single electron tunneling: A vibrating Single-Electron Transistor
- Tunneling broadening of vibrational sidebands in molecular transistors
- Incoherent dynamics of vibrating single-molecule transistors
- Temperature dependence of polaronic transport through single molecules and quantum dots
- Dissipative tunneling and orthogonality catastrophe in molecular transistors