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Negative-U, off-center OAs in GaAs and its relation to the EL3 level

Negativ-U, off-center OAs in GaAs und seine Beziehung zum EL3 Niveau
: Klausmann, E.; Schneider, J.; Kaufmann, U.; Alt, H.C.


Physical Review. B 43 (1991), Nr.14, S.12106-12109
ISSN: 0163-1829
ISSN: 1098-0121
ISSN: 0556-2805
Fraunhofer IAF ()
EL3 level; EL3 Niveau; negative-U; oxygen; Sauerstoff; SI-GaAs

Using comparative local-vibrational-mode and deep-level transient spectroscopy, we have studied the off-center O sub As defect in high-resistivity, undoped GaAs and neutron-transmutation-doped, n-type samples from the same starting material. The results fully support that this defect has a negative-U character. They also reveal that its deeper, two-electron level corresponds to the chemically unidentified EL 3 defect level in GaAs at E sub c -0.58 eV.