固体电解质电导开关的定量描述
Towards a Quantitative Description of Solid Electrolyte Conductance Switches
摘要：
本文对阻变器件中的稳态电子输运进行了定量分析。该器件由Ag $_{2}$ S（固体电解质）薄膜和大面积Ag参比电极组成，Ag薄膜与充当离子阻挡电极的Pt纳米接触。当施加偏置电压时，离子和电子传输都发生，并且根据极性，其导致离子在纳米接触周围的积累。在小的施加电压（开关前），我们观察到这是一个强烈的非线性电流-电压曲线，这已经使用Hebb-Wagner处理混合导体的极化建模。该模型正确地描述了直到电阻切换的稳态中极化固体电解质内的电子的传输，覆盖了非化学计量的整个范围，并且包括刚好在元素银沉积之前的过饱和范围。通过这种方式，这是朝着定量理解导致电阻切换的过程迈出的一步。
英文摘要：
We present a quantitative analysis of the steady state electronic transport in a resistive switching device. The device is composed of a thin film of Ag$_{2}$S (solid electrolyte) contacted by a Pt nano-contact acting as ion-blocking electrode, and a large area Ag reference electrode. When applying a bias voltage both ionic and electronic transport occurs, and depending on the polarity it causes an accumulation of ions around the nano-contact. At small applied voltages (pre-switching) we observed this as a strongly nonlinear current-voltage curve, which have been modeled using the Hebb-Wagner treatment for polarization of a mixed conductor. This model correctly describes the transport of the electrons within the polarized solid electrolyte in the steady state up until the resistance switching, covering the entire range of non-stoichiometries, and including the supersaturation range just before the deposition of elemental silver. In this way, it is a step towards a quantitative understanding of the processes that lead to resistance switching.
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