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Research Professor at Department of Materials Science & Engineering

          My research focuses on topics involving nanoscale science, engineering, and technology: viz. growth and design of heterostructures for multi-junction solar cells, quantum and optoelectronic devices, properties and performance of semiconductor devices and materials using molecular-beam epitaxy, electrical, optical, and materials characterization techniques, processing of semiconductors, metals, and insulators for device fabrication.  Earlier topics included co-integration of CMOS with III-V materials for single-chip, digital-system applications such as high-speed A/D conversion, communications, radar, and optoelectronics.  Other studies involved high-k dielectric gate insulators, silicon-on-lattice-matched insulators for three-dimensional stacking of thin-film transistors, transport and Hall measurements in graphene, tip-based nanomanufacturing in Si-based systems, and radiation tolerance in nanoelectronic and quantum devices.

          Past physics investigations include studies of semiconductors in low-dimensional configurations, experimental condensed-matter physics, transport and magnetoconduction in mesoscopic systems, quantum Hall effect, macroscopic quantum effects, magnetic (bulk and surface) phenomena, many-body effects in quantum solids/liquids, and high temperature superconductivity.  Related topics include weak localization and Coulomb interactions in 2-D systems. 

          I founded one of the nation's first university centers focused on nanoscale science and technology at Texas A&M University in 1989.  It was called the Center for Nanostructure Materials and Quantum Device Fabrication (NanoFAB Center) and was established under the auspices of the Texas Engineering Experiment Station (TEES) in the TAMU System.  Ten years later I moved the center, now known as the Nanotechnology Research and Education Center, to the University of Texas at Arlington where a clean room was built in a dedicated 30,000 sq. ft. building for nanotechnology activities.  

          My earliest research involved studies of the thermodynamic properties of helium isotopes, especially nuclear magnetism in solid 3He, fluid transport, and nuclear magnetic resonance (NMR) studies of the normal and superfluid phases of 3He.  This work required in-house fabrication of highly specialized apparatus for very low-temperature (0.0003 K) and high-magnetic-field (15 T) studies.  Some of this work utilized fast Fourier-transform pulsed-NMR spectroscopy, millikelvin cryogenic techniques, adiabatic demagnetization (CMN), high-field superconducting magnets, pulsed and continuous wave NMR in 3He, Cu, Pt to 1 mK and lower, compressional cooling of 3He (Pomeranchuk effect), 3He-4He dilution refrigerators, SQUID devices, and nuclear-hyperfine magnetic cooling of PrNi5 to 0.0003K.

Stony Brook University (SUNY)
Ph.D.
Physics
Stony Brook University (SUNY)
M.S.
Physics
Washington University
Physics
January 1999
January 2013
Professor
The University of Texas at Arlington
January 1990
January 2002
Director of NanoFAB
TEES/TAMU System
January 1975
January 1999
Professor
Texas A&M University, Texas A&M University System (TAMU)
January 1970
January 1975
Research Asocciate
University of Florida
AREAS OF EXPERTISE
Nanoscale science and technology; quantum electronic devices, photovoltaic devices, semiconductor devices and materials, solar cells, molecular-beam epitaxy and semiconductor processing. Other experience includes experimental condensed-matter physics: transport and magnetoconduction in mesoscopic systems, semiconductors in low-dimensional configurations, nanostructure physics, quantum Hall effect, macroscopic quantum effects, magnetic (bulk and surface) phenomena, many-body effects in quantum solids/liquids, high-temperature superconductivity and cryogenics.
2008
K. Clark, E. Maldonado, and W. P. Kirk. "III-V junctions on silicon substrates using BeTe buffer layers for solar cell applications," Journal of Applied Physics, vol. 103, no. 6, 2008.
Journal Article
Published
2008
J. Gandhi, K. Clark, and W. P. Kirk. "InAs quantum dots based solar cell: Multi-excitons," in Photovoltaic Specialists Conference, 2008. PVSC '08 (2008), pp. 1-4.
Conference Proceeding
Published
2008
K. Clark, E. Maldonado, M. Shuller, and W. P. Kirk. "Molecular beam epitaxy of CdSexTe1-x photovoltaic junctions on silicon substrates," in Photovoltaic Specialists Conference, 2008 (2008), pp. 1-4.
Conference Proceeding
Published
2007
E. M. Tao and W. P. Kirk. "Monolayer Passivation of Silicon (001) Surface by Selenium," Applied Surface Science, vol. 253, pp. 4578-4580, 2007.
Journal Article
Published
2007
F. S. Aguirre-Tostado, D. Layton, A. Herrera-Gomez, R. M. Wallace, J. Zhu, G. Larrieu, E. Maldonado, W. P. Kirk, and M. Tao. "X-ray photoelectron spectroscopy study of the oxidation of Se passivated Si(001)," Journal of Applied Physics, vol. 102, no. 8, 2007.
Journal Article
Published
2006
T. Sandu and W. P. Kirk. "Electronic and Optical Properties of Beryllium Chaleogenide/Silicon Heterostructures," Phys. Rev. B, vol. 73, pp. 235307, 2006.
Journal Article
Published
2006
K. Clark, E. Maldonado, R. T. Bate, and W. P. Kirk. "Photovoltaic Energy Conversion," in Conference Record of the 2006 IEEE rth World Conference (2006), pp. 56-58.
Conference Proceeding
Published
2006
J. Shanmugam, J. Zhu, Y. Xu, W. P. Kirk, and M. Tao. "Suppression of high-resistance phases of Ni silicide by Se passivation of Si(100)," in Electron Devices, IEEE Transactions on (2006), pp. 719-723.
Conference Proceeding
Published