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Vacancy-hydrogen complexes in germanium

B. J. Coomer* and R. Jones
Department of Physics, The University of Exeter, Exeter, EX4 4QL, United Kingdom

S. Öberg**
Department of Mathematics, University of Luleå, Luleå, S95 187, Sweden

P. R. Briddon
Department of Physics, The University of Newcastle upon Tyne,
Newcastle upon Tyne, NE1 7RU, United Kingdom

* EPSRC and the ENDEASD network are thanked for computer time and financial support respectively.
** Financially support by NFR and TFR, and computer support by PDC at KTH in Sweden are gratefully acknowledged.


Local-density-functional pseudopotential theory is used to investigate the structural, electronic and vibrational properties of vacancy-hydrogen complexes in germanium. The results are compared with recent infrared absorption data from proton and deuteron implanted Ge. The acceptor and donor levels of the VHn defects are derived semi-empirically from the relaxed structures.


Antonio Resende