Local Hydrogen Vibrational Modes in GaAs doped with Chalcogenides

✍ Scribed by P. Murugan; K. Ramachandran; N. Krishnamurthy

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 341 KB
• Volume: 36
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/1521-4079(200111)36:11<1263::aid-crat1263>3.0.co;2-0

✦ Synopsis

Infrared absorption on GaAs doped with Chalcogenides under hydrogen plasma treatment has shown the presence of two new localised modes, namely stretching and wagging modes. We present a simple nine atom molecular model to compute these defect modes by assuming the hydrogen to be bound in the antibonding position of the nearest Ga atom, resulting in a defect complex of C 3V symmetry. Group theoretical methods are employed to obtain the frequencies of the normal modes enabling precise identification of localised modes.