Bonding and optical contrast in phase change memory materials

J. Robertson, Bolong Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

The large optical contrast between crystalline and amorphous phases of phase change memory materials is shown to arise from a large increase in the optical matrix elements which occurs when resonant bonding is present. Resonance requires aligned p orbitals, and is lost in the amorphous phases, irrespective of coordination number. Transitions in resonance can be engineered by superlattice structures. KGaA, Weinheim.
Original languageEnglish
Pages (from-to)1867-1873
Number of pages7
JournalPhysica Status Solidi (B) Basic Research
Volume249
Issue number10
DOIs
Publication statusPublished - 1 Oct 2012
Externally publishedYes

Keywords

  • Amorphous chalcogenides
  • Electronic structure
  • Modelling
  • Phase change materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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