Author/Authors :
Lee، نويسنده , , Shin Buhm and Chang، نويسنده , , Seo Hyoung and Yoo، نويسنده , , Hyang Keun and Yoon، نويسنده , , Moon Jee and Yang، نويسنده , , Sang Mo and Kang، نويسنده , , Bo Soo، نويسنده ,
Abstract :
We find that resistance switching (RS) phenomena change reversibly between bipolar RS (BRS) and unipolar RS (URS) in a Pt/SrTiOx/Pt cell. For an asymmetric electrode configuration of Ti/SrTiOx/Pt cells whose top and bottom interfaces are Ohmic and Schottky-like rectifying, we determine that BRS only occurs when a positive voltage is applied to the bottom Pt electrode at the forming process. During the set process of BRS in a Pt/SrTiOx/Pt cell, O2 bubbles develop on the top Pt electrode. From the experimental results for a single sample in which both BRS and URS occur, O2− ion movement and consequent interfacial resistance modification might play an important role in BRS but not URS.
