The conduction current in a metal-insulator-metal structure |
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Authors: | V D Kulikov |
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Institution: | (1) Tomsk Polytechnical University, Tomsk, 634050, Russia |
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Abstract: | The flow of the conduction current in a metal-insulator-metal structure under X-ray and optical excitation is considered.
Accumulation of positive charge at the negative electrode in the KBr and CsI crystals is studied. The method of discharge
currents after the X-ray and optical excitation is suggested for estimation of the near-surface charge. It is shown that the
values of charge transported by the conduction current and those determined from the measured discharge-current signal are
in satisfactory agreement. The lifetimes of near-surface charges of holes and anionic vacancies and the values of the electric-field
strength at the metal-insulator interface are estimated. It is assumed that electroneutrality of the sample is established
owing to the motion of electrons from the surface into the bulk over dislocations. |
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Keywords: | |
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