In-Whan Lyo, received his BS degree in Physics from Seoul National University and then came to the University of Pennsylvania to complete his Ph.D. studies. His thesis work involved the use of Angle-Resolved Photoemission Spectroscopy to study the many body effects in nearly free electron metal Na. The title of his thesis was "A study of Na(110) and other nearly free electron metals using angle resolved photoemission spectroscopy." His thesis won the Elias Burstein Award at PENN in 1989. The pictures below were taken at the U-12 beamline at the National Synchrotron Light Source at Brookhaven National Laboratory. Pictured with In-Whan is Siu-Ching Lui.
A few of the important papers originating from In-Whan’s thesis are:

• “Experimental Band Structure of Potassium as Measured by Angle-Resolved Photoemission,” B. S. Itchkawitz, In-Whan Lyo, and E. W. Plummer, Phys. Rev. B 41, 8075 (1990).
• “Quasiparticle Band Structure of Na and Simple Metals,” In-Whan Lyo and E. W. Plummer, Phys. Rev. Lett. 60, 1558 (1988).
• “Auger Electron Ion Coincidnece Studies in Soft X-Ray Induced Fragmentation of N2,” W. Eberhardt, E. W. Plummer, I. W. Lyo, R. Carr, and W. K. Ford, Phys. Rev. Lett. 58, 207 (1987).
• “Photoemission from Ordered Physisorbed Molecular Phases N2/Graphite, N2, and CO/Ag(111),” D. Schmeisser, I. W. Lyo, F. Greuter, E. W. Plummer, H. J. Freund, and M. Seel, Ber. Bunsenges. Phys. Chem. 90, 228 (1986).

After leaving PENN he went to IBM in Yorktown Heights and then moved to his present position at Yonsei University in 1996.