Low temperature electrical transport properties of RuO2 and IrO2 single crystals

Juhn-Jong Lin*, S. M. Huang, Y. H. Lin, T. C. Lee, H. Liu, X. X. Zhang, R. S. Chen, Y. S. Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

We have systematically measured the electrical transport properties of several RuO2 and IrO2 single crystals over a wide temperature range from 300 K down to 0.3 K to study the conduction mechanisms in these oxides. Our measured resistivities are in close agreement with the recent band-theory calculations for these materials. The characteristic temperatures for the acoustic-mode and optical-mode phonons are determined. Our measured magnetoresistances are positive and follow the Kohler rule, indicating that the transport properties of these oxides exhibit normal behaviour as described by the Boltzmann equation. In contrast, we do not find any signature of superconductivity down to 0.3 K, though the band-theory calculations predict a superconducting transition temperature of ∼5 K. Magnetization measurements suggest a very low level of paramagnetic impurities in our crystals.

Original languageEnglish
Pages (from-to)8035-8041
Number of pages7
JournalJournal of Physics Condensed Matter
Volume16
Issue number45
DOIs
StatePublished - 17 Nov 2004

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    Lin, J-J., Huang, S. M., Lin, Y. H., Lee, T. C., Liu, H., Zhang, X. X., Chen, R. S., & Huang, Y. S. (2004). Low temperature electrical transport properties of RuO2 and IrO2 single crystals. Journal of Physics Condensed Matter, 16(45), 8035-8041. https://doi.org/10.1088/0953-8984/16/45/025