Solid State Physics


, Volume 26, Issue 1, pp 61-66

First online:

Non-ohmic conduction and electrical switching under pressure of the charge transfer complexo-tolidine-iodine

  • Hemamalini NaikAffiliated withDepartment of Physics, Indian Institute of Science
  • , S V SubramanyamAffiliated withDepartment of Physics, Indian Institute of Science

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The current voltage characteristics ofo-tolidine-iodine, with stoichiometry 1:1 grown from benzene, have been studied under high pressures upto 6 GPa atT=300 K andT=77 K. The characteristics show a pronounced deviation from ohmicity beyond a certain current for all pressures studied. At room temperature, beyond a threshold field the system switches from a low conductingOFF state to a high conductingON state with σONOFF ∼ 103. TheOFF state can be restored by the application of an a.c. pulse of low frequency. The temperature dependence of the two states studied indicates that theOFF state is semiconducting while theON state, beyond a certain applied pressure is metallic. The characteristics atT=77 K do not show any switching.


Non-ohmic conduction electrical switching high pressure charge transfer complex


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