Professor of Physics and Chairman
PhD, Brandeis University, Waltham, MA
Research Interests:
1. Development of new analytic tools for the study of surfaces, interfaces and nanostructures making use of low energy beams of positrons. Inventor and a principal developer of Positron annihilation induced Auger Electron Spectroscopy (PAES) a new surface spectroscopic tool capable of one monolayer depth resolution. Use of PAES in studies of the growth, stability, and inter-diffusion of ultra-thin layers of metals on metals semiconductors.
2. Synchrotron studies of surfaces, interfaces and multilayer structures (at the National Synchrotron Light Source, Brookhaven National Laboratory).
3. Studies of charged and open volume defects in semiconductors using a variable energy positron beam.
Research Groups: Experimental Condensed Matter and Positron Surface Group
Email: weiss@uta.edu
Location: Room 338 CPB
Phone: 817-272-2459
Selected Publications
(For a full listing: http://www.uta.edu/physics/main_two/faculty/weiss/psg/publications/index.html)
Study of the Adsorption of Hydrogen and Oxygen on
Si(100) using Positron Annihilation Induced Auger
Electron Spectroscopy (PAES), J.H. Kim, G. Yang, and
A.H. Weiss, Surf. Sci., 396, 388-393 (1998).
Positron states and annihilation characteristics at the
(100), (110), and (111) surfaces of alkali metals, N. G.
Fazleev, J. L Fry, and Alex Weiss, Phys. Rev. B. 57,
12506-19, (1998).
Positron interactions with overlayers of oxygen on
GaAs(100), Kim, J. H.; Nangia, A.; WEISS, A. H., "
Radiation Physics and Chemistry, 58,655-658 (2000)
Studies of the Auger spectrum from the (100) surface of
GaAs using positron annihilation induced Auger electron
spectroscopy, Fazleev, N. G.; Starnes, S.; WEISS, A. H.;
Fry, J. L," Radiation Physics and Chemistry, 58, 667-673
(2000).
Positrons as probes of Si(100) surface with adsorbed
hydrogen and oxygen, Fazleev, N. G.; Fry, J. L.; Weiss,
A. H Radiation Physics and Chemistry, 58, 659-665
(2000).
Positron Annihilation Induced Auger Spectroscopy (PAES),
Alex H. Weiss, Mat. Sci. Forum, 363-365, 537-541 (2001).
Papers in Refereed Journals (continued):
Low Energy Positrons at the Si(100)-2x1 Surface with
Adsorbed Hydrogen and Oxygen, N.G. Fazleev, J.L. Fry,
and A. H. Weiss, Mat. Sci. Forum, 363-365, 451-453
(2001).
Interface defects of Al/GaAs (100) detected by Positron
annihilation induced Auger Electron Spectroscopy (PAES),
W.-C. Chen, N.G. Fazleev, J.L. Fry, and A.H. Weiss, Mat.
Sci. Forum, 363-365, 621-623 (2001).
The effect of adsorbed atomic hydrogen on the growth of
ultrathin silicon films on Ge(100) studied by
positron-annihilation-induced Auger electron
spectroscsopy (PAES), J.H. Kim, A.H. Weiss, Surf. Sci.
460, 129-135, (2000).
Study of thin film growth of Fe/Cu(100) and Au/Si(100),
J.H. Kim, K.H. Lee, G. Yang, A.R. Koymen, and A.H.
Weiss, Nucl. Instr. and Meth. in Phys. Res. B, 171,
231-225, (2000).
Stability of an ultra-thin Fe film on a Cu(100) surface
studied by positron-annihilation induced Auger electron
spectroscopy (PAES), Kim JH, Lee KH, Yang G, Koymen AR,
Weiss A.H, Appl. Surf. Sci., 173, 2001, pp.203-7(2001).
Study of the growth and stability of ultra-thin films of
Au deposited on Si(100) and Si(111), Kim JH, Yang G,
Yang S, Weiss A.H., Surface Science, 475, 37-46 (2001).
Line shape of the Ag M/sub 4,5/VV Auger spectra measured
by Auger-photoelectroncoincidence spectroscopy, Arena
DA, Bartynski RA, Nayak RA, Weiss AH, Hulbert SL.
Physical Review B, vol.63, 155102-155108, (2001).
Experimental Determination of Positron-Related Surface
Characteristics of 6H-SiC, A. Nangia, J.H. Kim, A.H.
Weiss and G. Brauer, accepted for publication in Journal
of Applied Physics, (2001).
Books, Book Chapters, and Monographs:
1. Slow Positron Beam Techniques for Solids and
Surfaces, edited by Eric Ottewitte and Alex Weiss, AIP
Conference Proceedings 303, AIP Press, New York, ISBN
1-56396-267-5 (1994) .
2. A.H. Weiss, Positron Annihilation Induced Auger
Electron Spectroscopy, in Positrons at Metallic
Surfaces, Solid State Phenomena Volumes 28 & 29, edited
by A. Ishii, Trans Tech Publications, Aedermannsdorf
Switzerland, (1993) pp.317-340.
| Phys 1441 | General College Physics-Mechanics (Non-calculus) |
| Phys 1442 | General College Physics-Electricity/Magnetism (Non-calculus) |
| Phys 1443 | General College Physics-Mechanics (Calculus) |
| Phys 1444 | General College Physics-Electricity/Magnetism (Calculus) |
| Phys 2445 | Electronics (Undergraduate) |
| Phys 3313 | Modern Physics |
| Phys 3321 | Intermediate E&M Phys 4117, 4181, 4182 Undergraduate Research, Seminar |
| Phys 4324 | Advanced E&M (Undergraduate) |
| Phys 5301 | Physics of Materials (Solid State Physics for Materials Scientist) |
| Phys 5328 | Surface Physics |
| Phys 6302 | Methods of Applied Physics II (Graduate Electronics) |
| Phys 6391 | Positron Methods in Solid State Physics |
| Phys 6391 | Advanced Methods in Surface Analysis |
Teaching Recongnition:
Selected to teach Phys 3313 (Modern
Physics) on region wide closed circuit
TV system (TAGR) (Fall 1985).
Other Professional Activities
Scientific Chairman, Fifth International Workshop on Low Energy Positron Beam Techniques for Solids and Surfaces (SLOPOS 5), Jackson Hole Wyoming, August, 1992
Co-organizer of four day conference attended by 110 Scientists from 16 countries, co-editor of conference proceedings.