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Conductance fluctuations in cobalt valence tautomer molecular thin films
Jared P Phillips1, Saeed Yazdani1, Joseph Soruco1
1Department of Physics, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, USA. rucheng@iu.edu.
Abstract:
The conductivity changes associated with optical excitations and changing temperature in cobalt valence tautomer molecular thin films were investigated. Conductance switching in the presence of illumination is observed, with occasional locking in a higher conductance state, depending on the temperature, the photon energy of the illumination, and the bias voltage. Light of sufficiently short wavelengths is needed to ensure the light enhanced conductance switching, consistent with the optical absorption, but bias voltage clearly plays a role as well. The conductance switching is associated with excitations to the ligand to metal charge transfer state.
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