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Professor Soo,Yun-Liang




Office:886-3-5742799 (PHYS R104)
Lab Tel:886-3-5733255 (PHYS R408)

  1. 1995 Ph.D in Physics, State University of New York at Buffalo, Buffalo, New York, U.S.A
  2. 1985 B.S. in Physics, National Cheng Kung University, Tainan, Taiwan
  Professional Experience
Current position:
  1. 2011-present, Professor, Department of Physics, NTHU
  1. 2011-present, Professor, Department of Physics, NTHU
  2. 2004-2011 Associate Professor, Department of Physics, NTHU
  3. 2002-2004, Visiting Assistant Professor, Department of Physics, SUNY at Buffalo
  4. 1998-2001, Research Assistant Professor, Department of Physics, SUNY at Buffalo
  5. 1995-1998, Postdoctoral Research Associate, Department of Physics, SUNY at Buffalo
  Research Fields
    1. Solid State Physics
    2. Materials Physics
  Research Interests and achievement
Updated on September 3, 2006 

My research interest is mainly in the fields of Materials Physics and Synchrotron Radiation Applications. Recently, I have concentrated my works on the studies of nanocrystal, spintronic, and photovoltaic materials using synchrotron radiation x-ray techniques. Except for some nanocrystal samples prepared in my lab at Tsing Hua employing chemical methods, most of the samples used in my x-ray measurements have been provided by leading crystal growers in Taiwan, U.S. and Japan. During the past decade, I have probed the short-range-order and long-range-order structures, as well as local electronic structure and local magnetic properties of selected atomic species, in many spintronic materials including III-V based diluted magnetic semiconductors (DMS) such as Mn- and Fe-doped InAs, GaAs, and GaN systems and diluted magnetic oxides such as Co-doped TiOand HfO2 systems. As an example of important success in these research works, our experimental data have provided unambiguous proof for substitutional doping of transition metals in many III-V semiconductors including the first III-V DMS (In,Mn)As. My other works include characterization of nanocrystal and photovoltaic materials. All our experimental results have provided not only important insights for understanding interesting physical properties of the materials but also crucial feed-back information for sample growers to improve the materials for technological applications.

  Selected Publications
  1. [2006] Y. L. Soo, W. H. Sun, S. C. Weng, Y. S. Lin, S. L. Chang, L. Y. Jang, X. Wu and Y. Yan, “Local Environment Surrounding S and Cd in CdS:O Thin Films Photovoltaic Materials Probed by X-ray Absorption Fine Structures” Appl. Phys. Lett. 89 131908 (2006)
  2. [2004] Y. L. Soo, S. Kim, Y. H. Kao, A. J. Blattner, B. W. Wessels, S. Khalid, C. Sanchez Hanke, and C-. C. Kao “Local Structure Around Mn Atoms in Room-Temperature Ferromagnetic (In,Mn)As Thin Films Probed by Extended X-ray Absorption Fine Structure” Appl. Phys. Lett. 84, 481 (2004)
  3. [2003] Y. L. Soo, S. Wang, S. Kim, G. Kim, M. Cheon, X. Chen, H. Luo, Y. H. Kao, Y. Sasaki, X. Liu, and J. K. Furdyna “Variations of Long- and Short-Range-Order Structural and Magnetic Properties of Thermally Annealed Mn/GaAs Digital Alloys” Appl. Phys. Lett. 83, 2354 (2003)
  4. [2002] Y. L. Soo, G. Kioseoglou, S. Kim, Y. H. Kao, P. Sujatha Devi, John Parise, R. J. Gambino, and P. I. Gouma “Local Environment Surrounding Magnetic Impurity Atoms in a Structural Phase Transition of Co Doped TiO2 Nanocrystal Ferromagnetic Semiconductors” Appl. Phys. Lett. 81, 655 (2002)
  5. [2002] Y. L. Soo, G. Kioseoglou, S. Kim, X. Chen, H. Luo, Y. H. Kao, Y. Sasaki, X. Liu, and J. K. Furdyna “Studies of Mn/GaAs Digital Alloys Using X-ray Absorption Fine Structure and X ray Diffraction Methods” Appl. Phys. Lett. 80, 2654 (2002).
  6. [2001] Y. L. Soo, G. Kioseoglou, S. Kim, S. Huang, Y. H. Kao, S. Kuwabara, S. Owa, T. Kondo and H. Munekata “Local Structure and Chemical Valency of Mn Impurities in Wide-Bandgap III-V Magnetic Alloy Semiconductors Ga1-xMnxN” Appl. Phys. Lett. 79, 3926 (2001)
  7. [2001] Y. L. Soo, G. Kioseoglou, S. Huang, S. Kim, Y. H. Kao, Y. H. Peng and H. H. Cheng “Inverted Hut” Structure of Si-Ge Nanocrystals Studied by EXAFS method” Appl. Phys. Lett. 78, 3684 (2001)
  8. [2000] Y. L. Soo, S. Huang, S. Kim, G. Kioseoglou, Y. H. Kao, A. D. Compaan, D. Grecu, and D. Albin “Effects of heat treatment on diffusion of Cu atoms into CdTe single crystals” Appl. Phys. Lett. 76, 3729 (2000)
All Publications 

A. Journal Papers:



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