Optical properties of group-V atom-vacancy pairs in silicon
- 1 December 1989
- journal article
- research article
- Published by Taylor & Francis in Radiation Effects and Defects in Solids
- Vol. 111 (1) , 487-500
- https://doi.org/10.1080/10420158908213023
Abstract
Two optical absorption bands are identified as arising from the negative charge state of each of the P-, As-, and Sb-vacancy pairs in silicon. The more prominent band for each is at 6150, 6000, and 5500 cm−1, respectively. A second broader partially overlapping band at ∼8500 cm−1 is also present for each. Dichroism produced in the bands by uniaxial stress reveals a static Jahn-Teller distortion of opposite sign to that for the neutral state previously studied by EPR. The absorption bands can be identified as electron transitions from filled to empty orbitals of a simple one-electron molecular orbital model for the defect.Keywords
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