Si-compatible candidates for high-κ dielectrics with the Pbnm perovskite structure

Sinisa Coh, Tassilo Heeg, J. H. Haeni, M. D. Biegalski, J. Lettieri, L. F. Edge, K. E. O'Brien, M. Bernhagen, P. Reiche, R. Uecker, S. Trolier-Mckinstry, Darrell G. Schlom, David Vanderbilt

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Abstract

We analyze both experimentally (where possible) and theoretically from first principles the dielectric tensor components and crystal structure of five classes of Pbnm perovskites. All of these materials are believed to be stable on silicon and are therefore promising candidates for high- κ dielectrics. We also analyze the structure of these materials with various simple models, decompose the lattice contribution to the dielectric tensor into force constant matrix eigenmode contributions, explore a peculiar correlation between structural and dielectric anisotropies in these compounds and give phonon frequencies and infrared activities of those modes that are infrared active. We find that CaZrO3, SrZrO3, LaHoO3, and LaYO3 are among the most promising candidates for high- κ dielectrics among the compounds we considered.

Original languageEnglish (US)
Article number064101
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number6
DOIs
StatePublished - Aug 3 2010

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Coh, S., Heeg, T., Haeni, J. H., Biegalski, M. D., Lettieri, J., Edge, L. F., O'Brien, K. E., Bernhagen, M., Reiche, P., Uecker, R., Trolier-Mckinstry, S., Schlom, D. G., & Vanderbilt, D. (2010). Si-compatible candidates for high-κ dielectrics with the Pbnm perovskite structure. Physical Review B - Condensed Matter and Materials Physics, 82(6), [064101]. https://doi.org/10.1103/PhysRevB.82.064101