University of Wisconsin–Madison

Alexander Kvit

Biography

Alexander grew up in Chita, a city in Eastern Siberia in Russian Federation. He holds M.S. in physics and engineering from Moscow Institute of Physics and Technology (MIPT) in Russia, and Ph.D. in solid state physics from Lebedev Institute of Physics (LPI) of Russian Academy of Science, where he works with Serge Oktyabrsky.  After a postoc in LPI in Russia, Alexander joined the center headed by Jagdish Narayan in Department of Materials Science and Engineering in North Carolina State University in Raleigh, NC. Later Alexander worked as TEM manager for the same department in NC State University. In 2004 he accepted position of Associate Instrumentation Innovator and Laboratory Manager for TEM in Materials Science Center (MSC) in University of Wisconsin-Madison. Alexander joined Paul Voyles group in MS&E Department of UW-Madison in 2008, on the same time he continues to hold his responsibilities for MSC.

 

Research Interests

  • Impurities interaction with native point defects, formation of relevant impurity-related complexes in II-VI and III-V compounds and complex oxides.  The doping asymmetry problem of II-VI compounds.  Detection limit for impurity-related complex observation in Cs-corrected STEM microscopes. Development of new approaches to attack this problem. Relationship between impurity- complex formation and physical properties of materials. Impurity-complex or impurity cluster EELS spectrometry. Week EELS and EDS signal data analysis.
  • Doping -induced phase transformation in epitaxial structures, stress relaxation and extended defects formation.  Atomic structures of interfaces, domain walls and grain boundaries. Redistribution of impurities and point defects in the presence of the extended defects. Analysis of image contrast received by ABF and LAADF methods.
  • Development of novel methods for investigation of irradiated impurity complexes and some extended defects, where nano-size object will be under dual interaction of laser and electron probe. Analysis of optical spectra received after excitation of nano-object by laser probe in near-field mode and exposed to electron probe in STEM regime.

 

Publications

Alexander’s entire publication and presentation list is posted here.