Journal
JOURNAL OF APPLIED PHYSICS
Volume 129, Issue 20, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0050564
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Funding
- U.S. Office of Naval Research [N00014-20-1-2433]
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The resistive switching ZnO n-n homojunction diode fabricated with a stack of two dissimilar ZnO thin films shows promising characteristics for addressing the crosstalk problem in a crossbar memory array. The device exhibits a characteristic I-V-hysteresis loop and the maximum ratio of high resistive state to low resistive state occurs at 1 kHz ac signal at 3 V.
A resistive switching ZnO n-n homojunction diode fabricated with a stack of two dissimilar ZnO thin films shows promising characteristics necessary to address the crosstalk problem in a crossbar memory array. The device has a characteristic I-V-hysteresis loop in forward bias, in conjunction with its n-n junction characteristics. In the ac frequency range of 10 Hz-15 kHz, the area inside the hysteresis loop initially increased, reaching a maximum at 1 kHz, and then decreased with increasing frequency. The maximum in the area of the hysteresis loop corresponds to the accumulation of space charge at the interface. The resistivity of the device was found to vary from 5 to 100 k omega in the bias range of 0-10 V and in the range of 10(6) omega when reverse biased; the ratio of high resistive state to low resistive state has its maximum (similar to 2.4) at 1 kHz ac signal at 3 V.
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