Semiconductivity in the double-zigzag-chain complex oxide RE2Ba2CuPtO8(RE identical to Y, Er, Ho)
- 12 June 1989
- journal article
- letter
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 1 (23) , 3721-3726
- https://doi.org/10.1088/0953-8984/1/23/019
Abstract
The temperature dependence of electrical conductance has been measured on single crystals of the newly discovered oxide compound RE2Ba2CuPtO8 (RE identical to Y, Er, Ho). This Pt- containing oxide is orthorhombic and has a characteristic double-zigzag chain of -O2-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.Keywords
This publication has 12 references indexed in Scilit:
- Electrical conduction in dynamically disordered synthetic semiconductorsJournal of Physics C: Solid State Physics, 1988
- Magnetic properties of Y2Cu2O5Solid State Communications, 1988
- Sintering and Characterization of Er2Ba2Cu1.1Pt0.9O8 CompactsJapanese Journal of Applied Physics, 1988
- Structure of Er2Ba2Cu1+xPt1−xO8(x= 0.1)Acta Crystallographica Section C Crystal Structure Communications, 1988
- The structure of Y2Ba2CuPtO8Acta Crystallographica Section C Crystal Structure Communications, 1987
- Crystal growth of a new orthorhombic ErBa(Cu,Pt)O4 material: Crystal chemistry and characterizationJournal of Crystal Growth, 1987
- Synthesis and Single-Crystal Refinement of Ba 2 Y 2 CuPtO 8Europhysics Letters, 1987
- ESR and Magnetic Susceptibility in Y2BaCuO5Japanese Journal of Applied Physics, 1987
- Hopping conduction in quasi-one-dimensional disordered compoundsPhysical Review B, 1977
- Conduction in glasses containing transition metal ionsJournal of Non-Crystalline Solids, 1968