Abstract
We present a photoluminescence study with 500 nm lateral resolution on partially ordered bulk (GaIn)P alloys at lattice temperatures 3–60 K, external magnetic fields 0–12 T, and excitation power 0.1–100 In the known ordering-induced low energy emission band we resolve narrow optical transition lines with 0.3–1.0 meV width. They show no thermal broadening, a diamagnetic shift with pronounced anisotropy, and biexcitonic states. We demonstrate that the transitions are connected with intrinsic quasi-zero-dimensional electron-hole confinement formed at the antiphase-boundaries in the crystal.
- Received 8 February 1999
DOI:https://doi.org/10.1103/PhysRevB.61.1992
©2000 American Physical Society