Band structure and optical anisotropy in V-shaped and T-shaped semiconductor quantum wires

Details Band structure and optical anisotropy in V-shaped and T-shaped semiconductor quantum wires Band structure and optical anisotropy in V-shaped and T-shaped semiconductor quantum wires

1996-12-31

arxiv.org/abs/cond-mat/9612251v1

Phys. Rev. B 55 (1997), p. 7110

Physics

Condensed Matter

To appear in Phys. Rev. B (32 pages + 11 figures in postscript)

Scientific paper

10.1103/PhysRevB.55.7110

We present a theoretical investigation of the electronic and optical properties of V- and T-shaped quantum wires. Valence band mixing as well as realistic sample geometries are fully included through an accurate and efficient approach that is described here in detail. We investigate the resulting valence band structure, which shows some significant peculiarities, such as an anomalously large spin splitting in the lowest heavy hole subband of T-shaped wires. For both classes of wires we obtain good agreement between calculated optical absorption and recent experimental spectra, and we demonstrate that the analysis of optical anisotropy can be used as an effective tool to extract information on valence states, usually very difficult to obtain otherwise.

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