Hysteretic current-voltage characteristics and resistance switching at a rectifying Ti/Pr0.7Ca0.3MnO3 interface
Hysteretic current-voltage characteristics and resistance switching at a rectifying Ti/Pr0.7Ca0.3MnO3 interface
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DOI：
10.1063/1.1812580
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发表时间：
2004-11-01
影响因子：
4
通讯作者：
Tokura, Y
中科院分区：
文献类型：
--
作者：
Sawa, A;Fujii, T;Tokura, Y
我们研究了Pr0.7Ca0.3MnO3（PCMO）夹在SrRuO 3（SRO）底电极和几种顶电极（SRO、Pt、Au、Ag和Ti）之间的外延层状结构的垂直输运性质。在层状结构中，Ti/PCMO/SRO由于具有大滞后的整流I-V特性而不同。对应于I-V特性的滞后，通过施加脉冲电压应力，Ti/PCMO界面的接触电阻在两个稳定状态之间可逆地切换。我们提出了一个模型的电阻开关在Ti/PCMO界面，其中的肖特基势垒的宽度和/或高度被改变的界面态中的捕获的电荷载流子。(C)2004年，美国物理学会。
We have characterized the vertical transport properties of epitaxial layered structures composed of Pr0.7Ca0.3MnO3(PCMO) sandwiched between SrRuO3(SRO) bottom electrode and several kinds of top electrodes such as SRO, Pt, Au, Ag, and Ti. Among the layered structures, Ti/PCMO/SRO is distinct due to a rectifying I-V characteristic with a large hysteresis. Corresponding to the hysteresis of the I-V characteristics, the contact resistance of the Ti/PCMO interface reversibly switches between two stable states by applying pulsed voltage stress. We propose a model for the resistance switching at the Ti/PCMO interface, in which the width and/or height of a Schottky-like barrier are altered by trapped charge carriers in the interface states. (C) 2004 American Institute of Physics.