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First-principle investigation on the secondary bond in stable mGeTe·nSb2Te3 pseudo-binary chalcogenides

  • Fuzhou University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The Te-Te van der Waals-type secondary bond in stable mGeTe·nSb2Te3 (GST) pseudo-binary chalcogenides was investigated by means of ab initio calculations. The generalized gradient approximation of Perdew-Burke-Ernzerhof pseudopotential describes the Te-Te secondary bond very well. Whereas the local density approximation pseudopotential over-estimates the bond energy by underestimating the repulsive forces between the adjacent Te atoms. The electron localization function illustrates the chemical bonding nature of the Te-Te secondary bond. Our present results will shed insights on the secondary bonds in GST phase change materials.

Original languageEnglish
Title of host publicationBasic Research of Materials
EditorsYafang Han, Xuefeng Liu, Ying Wu
PublisherTrans Tech Publications Ltd
Pages778-783
Number of pages6
ISBN (Electronic)9783038353966
DOIs
StatePublished - 2015
EventChinese Materials Congress, CMC 2014 - Chengdu, China
Duration: 4 Jul 2014 → 7 Jul 2014

Publication series

NameMaterials Science Forum
Volume817
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

ConferenceChinese Materials Congress, CMC 2014
Country/TerritoryChina
CityChengdu
Period4/07/14 → 7/07/14

Keywords

  • First-principle calculations
  • GeSbTe
  • Phase change materials
  • Secondary bond

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