TY - JOUR
T1 - Electric field thermopower modulation analysis of an interfacial conducting layer formed between Y2O3 and rutile TiO2
AU - Mizuno, Taku
AU - Nagao, Yuki
AU - Yoshikawa, Akira
AU - Koumoto, Kunihito
AU - Kato, Takeharu
AU - Ikuhara, Yuichi
AU - Ohta, Hiromichi
N1 - Funding Information:
This work was partly supported by the Ministry of Education, Culture, Sports, Science and Technology (22360271, 22015009).
PY - 2011/9/15
Y1 - 2011/9/15
N2 - Electric field modulation analysis of thermopower (S)-carrier concentration (n) relation of a bilayer laminate structure composed of a 1.5-nm-thick conducting layer, probably TinO2n-1 (n = 2, 3,√ ) Magnéli phase, and rutile TiO2, was performed. The results clearly showed that both the rutile TiO2 and the thin interfacial layer contribute to carrier transport: the rutile TiO2 bulk region (mobility μ ∼ 0.03 cm2 V-1 s-1) and the 1.5-nm-thick interfacial layer (μ ∼ 0.3 cm2 V-1 s-1). The effective thickness of the interfacial layer, which was obtained from the S-n relation, was below ∼3 nm, which agrees well with that of the TEM observation (∼1.5 nm), clearly showing that electric field modulation measurement of S-n relation can effectively clarify the carrier transport properties of a bilayer laminate structure.
AB - Electric field modulation analysis of thermopower (S)-carrier concentration (n) relation of a bilayer laminate structure composed of a 1.5-nm-thick conducting layer, probably TinO2n-1 (n = 2, 3,√ ) Magnéli phase, and rutile TiO2, was performed. The results clearly showed that both the rutile TiO2 and the thin interfacial layer contribute to carrier transport: the rutile TiO2 bulk region (mobility μ ∼ 0.03 cm2 V-1 s-1) and the 1.5-nm-thick interfacial layer (μ ∼ 0.3 cm2 V-1 s-1). The effective thickness of the interfacial layer, which was obtained from the S-n relation, was below ∼3 nm, which agrees well with that of the TEM observation (∼1.5 nm), clearly showing that electric field modulation measurement of S-n relation can effectively clarify the carrier transport properties of a bilayer laminate structure.
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U2 - 10.1063/1.3633217
DO - 10.1063/1.3633217
M3 - Article
AN - SCOPUS:80053547281
VL - 110
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 6
M1 - 063719
ER -