TY - JOUR
T1 - Semiconductivity in the double-zigzag-chain complex oxide RE 2Ba2CuPtO8 (RE identical to Y, Er, Ho)
AU - Toyota, Naoki
AU - Koorevaar, P.
AU - Van Der Berg, J.
AU - Kes, P. H.
AU - Mydosh, J. A.
AU - Shishido, T.
AU - Saito, Y.
AU - Kuroda, N.
AU - Ukei, K.
AU - Sasaki, T.
AU - Fukuda, T.
PY - 1989/12/1
Y1 - 1989/12/1
N2 - The temperature dependence of electrical conductance has been measured on single crystals of the newly discovered oxide compound RE2Ba 2CuPtO8 (RE identical to Y, Er, Ho). This Pt- containing oxide is orthorhombic and has a characteristic double-zigzag chain of -O 2-Pt4+-O2-Cu2+-O2- in columns running parallel to the b axis, which is the growth direction of the rectangular-shaped long-bar single crystals. All these compounds are found to be semiconductors with energy gaps of about 0.2-0.4 eV. They exhibit conductances proportional to exp(-T-12/) rather than the thermally activated exp(-T-1) dependence. Such behaviour is discussed in terms of two models, namely one-dimensional variable-range hopping and the lattice-vibration-induced band-broadening effect.
AB - The temperature dependence of electrical conductance has been measured on single crystals of the newly discovered oxide compound RE2Ba 2CuPtO8 (RE identical to Y, Er, Ho). This Pt- containing oxide is orthorhombic and has a characteristic double-zigzag chain of -O 2-Pt4+-O2-Cu2+-O2- in columns running parallel to the b axis, which is the growth direction of the rectangular-shaped long-bar single crystals. All these compounds are found to be semiconductors with energy gaps of about 0.2-0.4 eV. They exhibit conductances proportional to exp(-T-12/) rather than the thermally activated exp(-T-1) dependence. Such behaviour is discussed in terms of two models, namely one-dimensional variable-range hopping and the lattice-vibration-induced band-broadening effect.
UR - http://www.scopus.com/inward/record.url?scp=36149031982&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36149031982&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/1/23/019
DO - 10.1088/0953-8984/1/23/019
M3 - Article
AN - SCOPUS:36149031982
VL - 1
SP - 3721
EP - 3726
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 23
M1 - 019
ER -