Abstract
A field-dependent two-dimensional exciton due to a Van Hove type M1 singularity at the top of superlattice minibands has been observed in MBE grown superlattices for the first time at room temperature. The largest ever-reported room temperature two-dimensional heavy hole exciton shift up to ~30meV was observed by field-dependent photocurrent measurements.
© 1989 Optical Society of America
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