By Topic

Electronic Properties of (100) Surfaces of GaSb and InAs and Their Alloys with GaAs

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Ludeke, R. ; IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA

Smooth, monocrystalline (100) surfaces of the alloys In1−xGaxAs and GaSb1−y Asy were prepared by molecular beam epitaxy. Both As-stabilized c(2 × 8) and metal-stabilized c(8 × 2) surface reconstructions were observed for In1−xGaxAs over the entire alloy range. GaSb1−yAsy exhibited a c(2 × 6) or (2 × 3) structure for y ≲ 0.2, and, after a transition region, the anion-stabilized c(2 × 8) or the Ga-stabilized c(8 × 2) structures for y ≳ 0.5. Electron energy loss spectroscopy revealed the simultaneous presence of two empty, dangling-bond derived surface states in both alloy systems. For In1−xGaxAs the In-derived empty surface state lies ≈0.4–0.5 eV below that of Ga and moves from above the conduction band edge into the band gap for x ≳ 0.6. The overlap between the Ga-and In-derived empty surface states causes the quenching of the Ga(3d) surface exciton. For GaSb1−yAsy the Sb dangling bonds generate an empty, localized surface state which lies 0.2–0.3 eV above the empty, Ga-derived surface state. Both levels lie above the conduction band edge throughout the alloy range.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:22 ,  Issue: 3 )