TY - JOUR
T1 - Interface resistance switching characteristics of metal/Nb-doped SrTiO 3 junctions
AU - Park, Chanwoo
AU - Kim, Dong Wook
PY - 2007/5
Y1 - 2007/5
N2 - We report on the transport properties of junctions consisting of metal electrodes (M = Ti, Ni, and Pt) and (001)-oriented Nb-doped SrTiO3 (Nb:STO) single crystals. The junctions with M = Ti, which had a shallow work function, exhibited linear current-voltage (I-V) characteristics without hysteresis. For M = Ni and Pt, with a large work function, the junctions showed rectifying I-V characteristics and notable hysteresis upon polarity reversal. The resistance change ratio for M = Ni (Pt) did (not) depend on the doping ratio of Nb:STO. This clearly suggests that the metal work function may not be sufficient to explain the resistance switching.
AB - We report on the transport properties of junctions consisting of metal electrodes (M = Ti, Ni, and Pt) and (001)-oriented Nb-doped SrTiO3 (Nb:STO) single crystals. The junctions with M = Ti, which had a shallow work function, exhibited linear current-voltage (I-V) characteristics without hysteresis. For M = Ni and Pt, with a large work function, the junctions showed rectifying I-V characteristics and notable hysteresis upon polarity reversal. The resistance change ratio for M = Ni (Pt) did (not) depend on the doping ratio of Nb:STO. This clearly suggests that the metal work function may not be sufficient to explain the resistance switching.
KW - Junction
KW - Resistance switching
UR - http://www.scopus.com/inward/record.url?scp=34250173857&partnerID=8YFLogxK
U2 - 10.3938/jkps.50.1294
DO - 10.3938/jkps.50.1294
M3 - Article
AN - SCOPUS:34250173857
SN - 0374-4884
VL - 50
SP - 1294
EP - 1297
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
IS - 5
ER -