26 research outputs found
Mechanical control of spin-orbit splitting in GaAs and InGaAs epilayers
Time-resolved Kerr rotation spectroscopy as a function of pump-probe
distance, voltage and magnetic field is used to measure the momentum-dependent
spin splitting energies in GaAs and InGaAs epilayers. The strain of the samples
can be reproducibly controlled in the cryostat using three- and four-point
bending applied with a mechanical vise. We find that the magnitude of the spin
splitting increases linearly with applied tension and voltage. A strain-drift
diffusion model is used to relate the magnitude of the measured spin-orbit
splitting to the amount of strain in the sample.Comment: 4 pages, 5 figure
Novel one-pot four-component condensation cyclization reactions for the synthesis of thiazolidine-4-one and 3 H
Mechanical control of spin-orbit splitting in GaAs and In0.04Ga0.96As epilayers
Time-resolved Kerr rotation spectroscopy as a function of pump-probe distance, voltage, and magnetic field is used to measure the momentum-dependent spin splitting energies in GaAs and InGaAs epilayers. The strain of the samples can be reproducibly controlled in the cryostat using three- and four-point bending applied with a mechanical vise. We find that the magnitude of the spin splitting increases linearly with applied tension and voltage. A strain-drift-diffusion model is used to determine the value of the spin-strain coupling coefficient for a strained GaAs epilayer
Analog Expert Design System (AEDS) Abschlussbericht
Design automation has reached a considerable level in the digital field at the beginning of the project, whereas for analog and mixed analog/digital design it lags far behind. Therefore it has been the main objective of the project 'Analog Expert Design System' to support an environment for the analog and mixed analog/digital IC- and system design, which assures optimized performance combined with short time to market. Tools for analysis of analog and mixed analog/digital circuits were improved by new methods. In the field of analog circuit synthesis tools were evaluated and improved on the basis of knowledge and experience of analog experts. For the layout synthesis of analog circuits a new tool has been developed. For the verification of these tools an example library was designed including functional macro-models, layout module generators as well as acquired, documented and coded knowledge for analog circuit design. Furthermore new tools were implemented into frameworks or design environments. The work performed improved analog and mixed analog/digital design considerably. On this basis further development work will be done to make analog design even more effective and to close the gap between the design of digital and analog or mixed analog/digital circuits. (orig.)SIGLEAvailable from TIB Hannover: F95B1200+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman