53 citations · 330 across the 18 of their papers we have counts for
19 papers
Large-area synthesis of ferromagnetic FeGeTe/graphene van der Waals heterostructures with Curie temperature above room temperature
H. Lv, A. da Silva, A. I. Figueroa +14
Van der Waals (vdW) heterostructures combining layered ferromagnets and other two-dimensional (2D) crystals are promising building blocks for the realization of ultra-compact devic…
Large-area van der Waals epitaxy and magnetic characterization of FeGeTe films on graphene
J. Marcelo J. Lopes, Dietmar Czubak, Eugenio Zallo +8
Scalable fabrication of magnetic 2D materials and heterostructures constitutes a crucial step for scaling down current spintronic devices and the development of novel spintronic ap…
Purveyors of fine halos III. Chemical abundance analysis of a potential omega Cen associate
Andreas J. Koch-Hansen, Camilla Juul Hansen, Linda Lombardo +3
Globular clusters (GCs) are important donors to the build-up of the Milky Way (MW) stellar halo, having contributed at the ten percent level over the Galactic history. Stars that o…
Purveyors of fine halos. II. Chemodynamical association of halo stars with Milky Way globular clusters
Michael Hanke, Andreas Koch, Zdenek Prudil +2
We present chemodynamical links between the present-day Milky Way halo field star population and Galactic globular clusters (GCs) using a dataset that combines information from the…
A high-precision abundance analysis of the nuclear benchmark star HD 20
Michael Hanke, Camilla Juul Hansen, Hans-Günter Ludwig +4
We present our chemical abundance investigation of the metal-poor ([Fe/H]=-1.60 dex), r-process-enriched ([Eu/Fe]=0.73 dex) halo star HD 20 using novel and archival high-resolution…
Plasma-assisted molecular beam epitaxy of NiO on GaN(00.1)
Melanie Budde, Thilo Remmele, Carsten Tschammer +8
The growth of NiO on GaN(00.1) substrates by plasma-assisted molecular beam epitaxy under oxygen rich conditions was investigated at growth temperatures between 100 C and…
Lattice matched Volmer-Weber growth of FeSi on GaAs(001) -- the influence of the growth rate
B Jenichen, Z Cheng, M Hanke +2
We investigate the formation of lattice matched single-crystalline FeSi/GaAs(001) ferromagnet/semiconductor hybrid structures by Volmer-Weber island growth, starting from the e…
Structural properties of CoTiSi films on GaAs(001)
B Jenichen, J Herfort, M Hanke +6
CoTiSi films were grown by molecular beam epitaxy on GaAs(001) and analyzed using reflection high-energy electron diffraction, and electron microscopy. In addition, X-ray dif…
Ordered structure of FeGe formed during solid-phase epitaxy
B Jenichen, M Hanke, S Gaucher +7
FeSi/Ge(Fe,Si)/FeSi thin film stacks were grown by a combination of molecular beam epitaxy and solid phase epitaxy (Ge on FeSi). The stacks were analyzed using el…
ATHOS: On-the-fly stellar parameter determination of FGK stars based on flux ratios from optical spectra
Michael Hanke, Camilla Juul Hansen, Andreas Koch +1
Tools for the spectroscopic determination of fundamental stellar parameters should not only comprise customized solutions for one particular survey or instrument, but, in order to…
The Orbit of the new Milky Way Globular Cluster FSR1716 = VVV-GC05
Rodrigo Contreras Ramos, Dante Minniti, Jose G. Fernandez-Trincado +10
We use deep multi-epoch near-IR images of the VISTA Variables in the Via Lactea (VVV) Survey to measure proper motions (PMs) of stars in the Milky Way globular cluster FSR1716 = VV…
Kinematics of outer halo globular clusters: M 75 and NGC 6426
Andreas Koch, Michael Hanke, Nikolay Kacharov
Globular clusters (GCs) and their dynamic interactions with the Galactic components provide an important insight into the structure and formation of the early Milky Way. Here, we p…
Influence of strain relaxation in axial (In,Ga)N/GaN nanowire heterostructures on their electronic properties
Oliver Marquardt, Thilo Krause, Vladimir Kaganer +3
We present a systematic study of the influence of elastic strain relaxation on the built-in electrostatic potentials and the electronic properties of axial (In,Ga)N/GaN nanowire he…
Counterintuitive strain distribution in axial (In,Ga)N/GaN nanowires
Thilo Krause, Michael Hanke, Oliver Brandt +1
We study the three-dimensional deformation field induced by an axial (In,Ga)N segment in a GaN nanowire. Using the finite element method within the framework of linear elasticity t…
Diffraction at GaAs/FeSi core/shell nanowires: the formation of nanofacets
Bernd Jenichen, Michael Hanke, Maria Hilse +3
GaAs/FeSi core/shell nanowire structures were fabricated by molecular-beam epitaxy on oxidized Si(111) substrates and investigated by synchrotron x-ray diffraction. The surfa…
Picosecond strain dynamics in GeSbTe monitored by time-resolved x-ray diffraction
Paul Fons, Peter Rodenbach, Kirill V. Mitrofanov +9
Coherent phonons (CP) generated by laser pulses on the femtosecond scale have been proposed as a means to achieve ultrafast, non-thermal switching in phase-change materials such as…
The effect of the buffer layer coupling on the lattice parameter of epitaxial graphene on SiC(0001)
Timo Schumann, Martin Dubslaff, Myriano H. Oliveira +3
Grazing incidence X-ray diffraction (GID) was employed to probe the structure of atomically thin carbon layers on SiC(0001): a so-called buffer layer (BL) with a $6(\sqrt{3}\times\…
Localization and defects in axial (In,Ga)N/GaN nanowire heterostructures investigated by spatially-resolved luminescence spectroscopy
Jonas Lähnemann, Christian Hauswald, Martin Wölz +4
(In,Ga)N insertions embedded in self-assembled GaN nanowires are of current interest for applications in solid state light emitters. Such structures exhibit a notoriously broad emi…
Coexistence of quantum-confined Stark effect and localized states in an (In,Ga)N/GaN nanowire heterostructure
Jonas Lähnemann, Oliver Brandt, Carsten Pfüller +7
We analyze the emission of single GaN nanowires with (In,Ga)N insertions using both micro-photoluminescence and cathodoluminescence spectroscopy. The emission spectra are dominated…