Observation of Peierls transition in nanowires (diameter approximately 130 nm) of the charge transfer molecule TTF-TCNQ synthesized by electric-field-directed growth.
We report the growth of nanowires of the charge transfer complex tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) with diameters as low as 130 nm and show that such nanowires can show Peierls transitions at low temperatures. The wires of sub-micron length were grown between two prefabricated electrodes (with sub-micron gap) by vapor phase growth from a single source by applying an electric field between the electrodes during the growth process. The nanowires so grown show a charge transfer ratio approximately 0.57, which is close to that seen in bulk crystals. Below the transition the transport is strongly nonlinear and can be interpreted as originating from de-pinning of CDW that forms at the Peierls transition.
Sai
T Phanindra
TP
Department of Physics, Indian Institute of Science, Bangalore, India. phanindra@physics.iisc.ernet.in
Raychaudhuri
A K
AK