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11 papers · 1 filter
Temperature and frequency dependent optical properties of ultra-thin Au films
Tobby Brandt, Martin Hövel, Bruno Gompf +1
While the optical properties of thin metal films are well understood in the visible and near-infrared range, little has been done in the mid- and far-infrared region. Here we inves…
Direct Observation of Quantum Coherence in Single-Molecule Magnets
C. Schlegel, J. van Slageren, M. Manoli +2
Direct evidence of quantum coherence in a single-molecule magnet in frozen solution is reported with coherence times as long as T2 = 630 ns. We can strongly increase the coherence…
Analysis of broadband microwave conductivity and permittivity measurements of semiconducting materials
Elvira Ritz, Martin Dressel
We perform broadband phase sensitive measurements of the reflection coefficient from 45 MHz up to 20 GHz employing a vector network analyzer with a 2.4 mm coaxial sensor which is t…
Fracture of complex metallic alloys: An atomistic study of model systems
F. Rösch, H. -R. Trebin, P. Gumbsch
Molecular dynamics simulations of crack propagation are performed for two extreme cases of complex metallic alloys (CMAs): In a model quasicrystal the structure is determined by cl…
Tiling models for metadislocations in AlPdMn approximants
Michael Engel, Hans-Rainer Trebin
The AlPdMn quasicrystal approximants xi, xi', and xi'_n of the 1.6 nm decagonal phase and R, T, and T_n of the 1.2 nm decagonal phase can be viewed as arrangements of cluster colum…
Dynamic fracture of icosahedral model quasicrystals: A molecular dynamics study
F. Rösch, Ch. Rudhart, J. Roth +2
Ebert et al. [Phys. Rev. Lett. 77, 3827 (1996)] have fractured icosahedral Al-Mn-Pd single crystals in ultrahigh vacuum and have investigated the cleavage planes in-situ by scannin…