Switching behaviour of stilbene molecular device: a first-principles study

• Main Authors: V. Nagarajan, R. Chandiramouli
• Format: Article
• Language: English
• Published: Institute for Condensed Matter Physics 2018-12-01
• Series: Condensed Matter Physics
• Subjects: stilbene; molecular device; electron density; switching; transmission
• Online Access: https://doi.org/10.5488/CMP.21.43301

The switching behaviour of stilbene molecular system (SMS) device is investigated with the help of non-equilibrium Green’s function (NEGF) approach using first principles calculation. The transmission spectrum of cis-isomers confirmed that more electrons are transferred across the SMS-device using optical excitation by the spin of C=C bond by torsion angle (θ = 180°). The current-voltage characteristics show the lower magnitude of current for trans-stilbene and higher magnitude of current for cis-stilbene for an externally applied bias voltage. The outcome of the proposed work suggests that cis and trans-stilbene molecular device can be used as a switch.