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Article
Open AccessNew insights into microstructure of neutron-irradiated tungsten
The development of appropriate materials for fusion reactors that can sustain high neutron fluence at elevated temperatures remains a great challenge. Tungsten is one of the promising candidate materials for p...
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Article
Open AccessSelf-amplified photo-induced gap quenching in a correlated electron material
Capturing the dynamic electronic band structure of a correlated material presents a powerful capability for uncovering the complex couplings between the electronic and structural degrees of freedom. When combi...
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Chapter and Conference Paper
Electronic Scattering Dynamics and Ultrafast Magnetization Dynamics
A dynamical model for Elliott-Yafet type scattering of carriers and its importance for the demagnetization dynamics after ultrafast optical excitation is reviewed. It is pointed out that the demagnetization in...
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Chapter and Conference Paper
Electron Lifetimes in a 2D Electron-Gas with Rashba SO-Coupling: Screening Properties
We calculate lifetimes due to electron-electron scattering in a 2D Rashba band structure and study the influence of the substrate screening. A comparison with measurements on the quantum-well system Bi/Cu(111)...
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Chapter and Conference Paper
Relaxation Dynamics of Majority and Minority Electrons After Ultrashort Laser Excitation
We analyze the ultrafast demagnetization after ultrashort laser excitation by a kinetic model based on Elliott-Yafet scattering processes. By applying complete Boltzmann scattering integrals we trace the major...
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Article
Plastic material parameters and plastic anisotropy of tungsten single crystal: a spherical micro-indentation study
Enhancement of toughness is currently a critical engineering issue in tungsten metallurgy. The inherent toughness of tungsten single crystals is closely related to the capacity for local plastic slip. In this ...
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Article
Optical absorption spectra of finite systems from a conserving Bethe-Salpeter equation approach
We present a method for computing optical absorption spectra by means of a Bethe-Salpeter equation approach, which is based on a conserving linear response calculation for electron-hole coherences in the pres...
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Article
Conserving quasiparticle calculations for small metal clusters
A novel approach for GW-based calculations of quasiparticle properties for finite systems is presented, in which the screened interaction is obtained directly from a linear response calculation of the density-...
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Chapter and Conference Paper
Hanle-oscillations in the stimulated emission of microcavity laser
We demonstrate a new phenomenon in the emission dynamics of semiconductor microcavities. Hanle-oscillations of the electron spins modulate the gain of microcavities up to extremely high frequencies. So far, we...
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Article
Diskrete neurologische Befunde als Erstmanifestation eines Ornithintranscarbamylase (OTC)-Defekts