Scaling effect on unipolar and bipolar resistive switching of metal oxides.
Scaling effect on unipolar and bipolar resistive switching of metal oxides.
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DOI:
10.1038/srep01657
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发表时间:
2013
影响因子:
4.6
通讯作者:
Kawai, Tomoji
中科院分区:
文献类型:
--
作者:
Yanagida, Takeshi;Nagashima, Kazuki;Oka, Keisuke;Kanai, Masaki;Klamchuen, Annop;Park, Bae Ho;Kawai, Tomoji
Electrically driven resistance change in metal oxides opens up an interdisciplinary research field for next-generation non-volatile memory. Resistive switching exhibits an electrical polarity dependent “bipolar-switching” and a polarity independent “unipolar-switching”, however tailoring the electrical polarity has been a challenging issue. Here we demonstrate a scaling effect on the emergence of the electrical polarity by examining the resistive switching behaviors of Pt/oxide/Pt junctions over 8 orders of magnitudes in the areas. We show that the emergence of two electrical polarities can be categorised as a diagram of an electric field and a cell area. This trend is qualitatively common for various oxides including NiOx, CoOx, and TiO2-x. We reveal the intrinsic difference between unipolar switching and bipolar switching on the area dependence, which causes a diversity of an electrical polarity for various resistive switching devices with different geometries. This will provide a foundation for tailoring resistive switching behaviors of metal oxides.
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