Low thermal conductivity of CsBiNb2 O7 epitaxial layers

David G. Cahill, Alexander Melville, Darrell G. Schlom, Mark A. Zurbuchen

Research output: Contribution to journalArticlepeer-review


The thermal conductivity of an epitaxial layer of CsBiNb2 O 7 grown by pulsed-laser deposition is measured by time-domain thermoreflectance in the temperature range 100<T<600 K. Characterization by x-ray diffraction and cross-sectional transmission electron microscopy show that the sample has the n=2 structure of the Dion-Jacobson series of phases. The conductivity of this layered oxide is ≈60% of the predicted minimum thermal conductivity in this temperature range; the thermal conductivity at room temperature, 0.4 W m-1 K-1, is comparable to the lowest conductivity ever observed in an oxide crystal.

Original languageEnglish (US)
Article number121903
JournalApplied Physics Letters
Issue number12
StatePublished - 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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