Premium
TEM study of the structural similarity between NaCl and rhombohedral phase of Te‐based ternary chalcogenide materials
Author(s) -
Sun Changwoo,
Lee Jeongyong,
Kim Yongtae
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200824226
Subject(s) - crystallography , trigonal crystal system , transmission electron microscopy , ternary operation , metastability , lattice (music) , chalcogenide , high resolution transmission electron microscopy , chemistry , materials science , phase transition , condensed matter physics , crystal structure , nanotechnology , physics , metallurgy , organic chemistry , computer science , acoustics , programming language
Abstract Comparing the phase‐change behaviour of Ge–Bi–Te (GBT) to that of Ge–Sb–Te (GST), we have tried to verify a general relationship between a metastable NaCl and a stable rhombohedral structure that is easily incurred by stretching the cube along the body diagonal. High‐resolution transmission electron microscopy (TEM) images show that the NaCl as well as the rhombohedral GBT and GST structures are observed along specific directions. From the TEM images, we suggest an atomic model and a phase transition mechanism by lattice distortion. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)