Resonance Effects of Excitons and Electrons: Basics and Applications

ISBN-13: 9783642358067 / Angielski / Miękka / 2013 / 283 str.

Ion Geru;Dieter Suter

Opis

This book presents the various types of resonance effects on excitons, biexcitons and the local electronic centers (LEC) in solids, such as paramagnetic and paraelectric resonances on excitons, exciton acoustic resonance at intra- and interband transitions, radio-optical double resonance on excitons, hole-nuclear double resonance on localized biexcitons, ENDOR and acoustic ENDOR on LEC. The criteria for the generation of coherent photons, phonons and magnons by excitons are explained. The interactions of excitons and biexcitons with paramagnetic centers and nuclear spins, the indirect interaction between the PC through a field of excitons as well as the quasienergy spectrum of excitons and spin systems are discussed. It is proved that the interaction of paramagnetic centers with excitons increases the spin relaxation rate of paramagnetic centers in comparison with the case of their interaction with free carriers. The giant magneto-optical effects in semi-magnetic semiconductors are theoretically interpreted.In recent years, a new perspective has been added to these systems and their interactions: They can be used for storing and processing information in the form of quantum bits (qubits), the building blocks of quantum computers. The basics of this emerging technology are explained and examples of demonstration-type quantum computers based on localized spins in solids are discussed.

Spis treści

Excitons and Biexcitons in Semiconductors.- Paramagnetic and Paraelectric Resonances of Excitons.- Exciton Acoustical Resonance.- Double Resonances.- Investigations of Excitons by Means of NMR Spectroscopy.- Interaction of Excitons with Paramagnetic Centers.- Effects of Deep Saturation.

O autorze

1983-1996 Professor of Department of General Physics, Faculty of Physics, State University of Moldova 1996-1997 Head of Department of General Physics, Faculty of Physics, State University of Moldova 1997-2005 Professor of the Department of Physics and Theoretical Physics, Faculty of Physics, State University of Moldova 2005-2008 Director of the National Center for Analytical Methods and Metrology of the Academy of Sciences of Moldova. 2008-pressent Head of the Laboratory “Magnetic Resonance and Laser Spectroscopy”, Center of Chemical Physics and Nanocomposites, Institute of Chemistry of the Academy of Sciences of Moldova