Impurity vibration modes in II-VI and III-V mixed semiconductors

✍ Scribed by Postnikov, Andrei ;Pagès, Olivier ;Souhabi, Jihane ;Nassour, Ayoub ;Hugel, Joseph

• Book ID: 105365270
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 405 KB
• Volume: 206
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200881217

✦ Synopsis

Abstract

The analysis of vibration frequencies in dilute semiconducting alloys is addressed, as part of a more vast paradigm for the description of lattice dynamics in semiconductor alloys within the “1 bond – 2 mode” concept. Specific cases considered are those of Be impurities in ZnSe (system with high elastic contrast; aspects of impurity clustering) and of (Ga,In)As alloys, exhibiting much smaller elastic contrast and almost vanishing value of the mode splitting parameter, Δ. First‐principles calculations of frequencies are done by Siesta method, using 64‐atom supercells. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)