Saturday, August 25, 2007

Applied Physics Letters 84, 1756 (2004)

Atom-resolved scanning tunneling microscopy of (In,Ga)As quantum wires on GaAs(311)A

H. Wen, Z. M. Wang, and G. J. Salamo
Physics Department, University of Arkansas, Fayetteville, Arkansas 72701

Generally (In,Ga)As strained growth on GaAs surfaces results in zero-dimensional quantum dots. The formation of one-dimensional quantum wires is demonstrated during (In,Ga)As molecular-beam-epitaxial growth on GaAs(311)A at high temperature. The wires are running along the [–233] direction. Atomically resolved scanning tunneling microscopy images reveal that the wires are triangular-shaped in cross section and the two side bonding facets are {11,5,2}. These results are discussed in terms of a mechanism of strain-driven facet formation.

Further reading on Quantum Wires:
Strong optical nonlinearity in strain-induced laterally ordered In0.4Ga0.6As quantum wires on GaAs (311)A substrate
Yu. I. Mazur, Zh. M. Wang, G. G. Tarasov, H. Wen, V. Strelchuk, D. Guzun, M. Xiao, G. J. Salamo, T. D. Mishima, Guoda D. Lian, and M. B. Johnson
Journal of Applied Physics 95, 053711 (2005)
Orientation dependence behavior of self-assembled (In,Ga)As quantum structures on GaAs surface
Sh. Seydmohamadi, Zh. M. Wang, G. J. Salamo
Journal of Crystal Growth 275, 410 (2005)
Surface dynamics during molecular-beam epitaxy of (In,Ga)As on GaAs(331)B: Formation of quantum wires with low In content
Zh. M. Wang, Sh. Seydmohamadi, V. R. Yazdanpanah, and G. J. Salamo
Physics Review B 71, 165315 (2005)
Self assembled (In,Ga)As quantum structures on GaAs(411)A
Sh. Seydmohamadi, Zh. M. Wang, G. J. Salamo
Journal of Crystal Growth 269, 257 (2004)
Polarization spectroscopy of InGaAs/GaAs quantum wires grown on (331)B GaAs template with nanoscale fluctuations
X.Y.Wang, Z.M.Wang, V.R.Yazdanpanah, G.J.Salamo, and M.Xiao
Journal of Applied Physics 95, 1609 (2004)
Highly anisotropic morphologies of GaAs(331) surfaces
V. R. Yazdanpanah, Z. M. Wang, and G. J. Salamo
Applied Physics Letters 82, 1766 (2003)