Abstract
This work emphasizes that the transition voltages for both bias polarities ( 0) should be used to properly determine the energy offset of the molecular orbital closest to electrodes’ Fermi level and the bias asymmetry in molecular junctions. Accurate analytical formulas are deduced to estimate and solely in terms of . These estimates are validated against experiments, by showing that full experimental - curves measured by Beebe et al. [Phys. Rev. Lett. 97, 026801 (2006)] and Tan et al. [Appl. Phsy. Lett. 96, 013110 (2010)] for both bias polarities can be excellently reproduced.
- Received 2 November 2011
DOI:https://doi.org/10.1103/PhysRevB.85.035442
©2012 American Physical Society