Surface conduction in InAs and GaSb

D. E. Sidor; G. R. Savich; G. W. Wicks

doi:10.1117/12.2188878

1 September 2015 Surface conduction in InAs and GaSb

D. E. Sidor, G. R. Savich, G. W. Wicks

Proceedings Volume 9616, Nanophotonics and Macrophotonics for Space Environments IX; 96160U (2015) https://doi.org/10.1117/12.2188878
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

This work presents a fundamental investigation of the surface conduction pathways occurring along etched sidewalls in devices fabricated from InAs and GaSb. Surface leakage currents are identified by their dependence on device size and thermal activation energy, and are characterized in terms of sheet conductance. InAs is found to have a temperature-independent sheet conductance of approximately 8×10^-8 mho×square. The sheet conductance of GaSb is comparable to that of InAs at room temperature, and when cooled it decreases with a thermal activation energy of 75 meV, which is approximately equal to the known separation between the valence band and surface Fermi level. The temperature dependence of the surface conductance of the two materials indicates that the surface of InAs is degenerate and the surface of GaSb is non-degenerate.

Citation Download Citation

D. E. Sidor, G. R. Savich, and G. W. Wicks "Surface conduction in InAs and GaSb", Proc. SPIE 9616, Nanophotonics and Macrophotonics for Space Environments IX, 96160U (1 September 2015); https://doi.org/10.1117/12.2188878

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available