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The Effect of Intrinsic Defects on Resistive Switching Based on pn Heterojunction

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We report a unidirectional bipolar resistive switching in an n-type GaO x /p-type NiO x heterojunction fabricated by magnetron sputtering at room temperature. The resistive switching (RS) of the heterojunction directly relate with the concentration of intrinsic defects in oxide, such as oxygen vacancies and oxygen ions. Under external electric field, these electromigrated defects accumulate at the pn junction interface and modify the interface barrier, forming or rupturing the filamentary paths between n-GaO x and p-NiO x , leading to the switching between Ohmic and diode characteristics of the device.
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Keywords: FILAMENT; HETEROJUNCTION; INTERFACE; INTRINSIC DEFECTS; RESISTIVE SWITCHING

Document Type: Research Article

Publication date: August 1, 2013

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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