Titanium oxides and silicates as high-κ dielectrics: A first-principles investigation

G. M. Rignanese, X. Rocquefelte, X. Gonze, Alfredo Pasquarello

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Using density functional theory, we investigate the structural, vibrational, and dielectric properties of titanium oxides and silicates, which have attracted considerable attention in the framework of the quest for alternative high-κ materials. For the oxides, three crystalline phases of titanium dioxide are considered. The first two are hypothetical; they are obtained by similarity with the cubic and tetragonal structure of zirconia ZrO2 or hafnia HfO2. The third is the rutile, a crystal that occurs naturally. For the silicates, we analyze a hypothetical TiSiO 4 structure constructed by analogy with crystalline ZrSiO 4 and HfSiO4 (zircon and hafnon).

Original languageEnglish
Pages (from-to)793-801
Number of pages9
JournalInternational Journal of Quantum Chemistry
Volume101
Issue number6
DOIs
Publication statusPublished - 20 Feb 2005
Externally publishedYes

Keywords

  • Dielectric properties
  • Dielectrics
  • High-κ
  • Silicates
  • Transition metal oxides
  • Vibrational properties

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