Ambipolar diffusion, non linear I-V relations and hysteresis in solid state devices based on oxide mixed-ionic-electronic-conductors

TYPEIonic Solid State Physics
Speaker:Amir Leshem
Affiliation:Technion
Date:09.12.2010
Time:11:30
Location:Lidow 724
Remark:Student seminar
Abstract:

We calculate the current-voltage relations in solid state devices of the form metal1|MIEC|metal2 where MIEC is a mixed ionic electronic conductor in which the acceptors are mobile. Due to this mobility complicated I-V relations result. We pay attention to the response of the device to periodic signals. The calculations reveal various types of non linear I-V relations, as well as hysteresis and quasi switching.  The defect distribution changes under current are also calculated and allow better understanding of the processes taking place in the device.