Event announcement as pdf-Download (https://tu-dresden.de/mn/phys ik/ressourcen/dateien/physikalisches-kolloquium/2026-06-23-Phys_Kolloq-Lav rov-SoSe2026.pdf).
Abstract: In initial courses o n solid-state physics\, the concept of an ideal crystal is introduced in w hich each atom occupies a certain place. This\, however\, is an idealizati on that is very far from reality. There are no ideal crystals. Already in the early stages of the solid-state research\, it was established that def ects often have a profound effect on their physical properties. The very e xistence of semiconductor electronics is based on the ability to control b oth the magnitude and type of electrical conductivity by introducing small additions of chemical impurities that have the properties of shallow dono rs or acceptors. This presentation will focus on one of the most technolog ically important and scientifically fascinating impurities—hydrogen—wh ich has been a central theme of our research for more than two decades. De pending on the host material\, hydrogen may passivate defects and enhance semiconductor performance\, while in other cases it may constitute a major obstacle preventing otherwise promising materials from reaching their ful l technological potential. Particular attention will be devoted to hydroge n-related donors\, molecular hydrogen species\, their ortho-para transitio ns\, photodissociation processes\, and the phase transition of a two-dimen sional hydrogen \"gas\" confined within platelets. The discussion will enc ompass a variety of semiconductors\, including Si\, Ge\, GaAs\, and ZnO.
Short bio: Education: 1984–1990: Moscow Institut e of Physics and Technology (MIPT)\; 1994 Ph.D. (Doctoral Thesis)\; Disser tation: Fine Structure of the Photoluminescence Spectra of Excitons Bound to Isoelectronic Centers in Silicon Supervisor: Prof. Alexander Kaminskii\ ; 2006 Habilitation (Doctor of Sciences)\, Thesis: Optical Spectroscopy of Hydrogen and Carbon Centers in Semiconductors Professional Experience: 19 92–2006 Research Staff Member Institute of Radioengineering and Electro nics\, Russian Academy of Sciences\; 1997–1999 Postdoctoral Research Fel low Aarhus University\, Denmark Host: Prof. Brian B. Nielsen\; 2000– 200 1: As a Alexander von Humboldt Research Fellow joined Prof. Jörg Weber's group to establish the Chair of Semiconductor Physics\; Since 2001 Researc h Staff Member TUD Dresden University of Technology\, Germany.
DTSTAMP:20260715T065751Z CREATED:20260620T053925Z LAST-MODIFIED:20260623T053926Z END:VEVENT END:VCALENDAR