A5038495248- Electron and X-Ray Spectroscopy Techniques
- Surface and Thin Film Phenomena
- Graphene research and applications
- Semiconductor materials and devices
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Semiconductor materials and interfaces
- Quantum and electron transport phenomena
- Electronic and Structural Properties of Oxides
- Advanced Electron Microscopy Techniques and Applications
- Advanced Measurement and Metrology Techniques
- 2D Materials and Applications
- Multiferroics and related materials
- Experimental Learning in Engineering
- Optical measurement and interference techniques
- Magnetic Properties of Alloys
- Topological Materials and Phenomena
- Photonic and Optical Devices
- Advanced Materials Characterization Techniques
- Higher Education Learning Practices
- Magnetic properties of thin films
- Electrochemical Analysis and Applications
- Molecular Junctions and Nanostructures
- Optical Systems and Laser Technology
- Photonic Crystals and Applications
Leiden University
2011-2021
Huygens Institute for History and Culture of the Netherlands
2017
University of Twente
2007-2012
We present a study of the thickness dependence magnetism and electrical conductivity in ultrathin ${\mathrm{La}}_{0.67}{\mathrm{Sr}}_{0.33}{\mathrm{MnO}}_{3}$ films grown on ${\mathrm{SrTiO}}_{3}$ (110) substrates. found critical 10 unit cells below which disappeared simultaneously Curie temperature increased, indicating magnetic insulating phase at room temperature. These samples have about 560 K with significant saturation magnetization...
Abstract The properties of any material are fundamentally determined by its electronic band structure. Each represents a series allowed states inside material, relating electron energy and momentum. occupied bands, that is, the filled below Fermi level, can be routinely measured. However, it is remarkably difficult to characterize empty part structure experimentally. Here, we present direct measurements unoccupied bands monolayer, bilayer trilayer graphene. To obtain these, introduce...
The magnetic behavior of La0.67Sr0.33MnO3 (LSMO) films grown on SrTiO3 (110) substrates was studied. In-plane uniaxial anisotropy with the easy axis aligned [001] lattice direction observed, together an out-of-plane component. This is explained by crystal structure films, which shows a tilt (001) planes. creates long body diagonal forces and results in domain formation. size estimated at 500 nm. switching magnetization well described two-phase model takes both coherent rotation wall motion...
We describe the layout and capabilities of a new aberration-corrected low-energy electron microscopy (LEEM) photoemission (PEEM) facility, which features real- reciprocal-space spectroscopy. This setup, named Electronic, Structural, Chemical Nanoimaging in Real Time (ESCHER), was recently installed at Leiden University. It has three major instrumentation-related goals. First, we aim to reach ultimate spatial resolution facilitated by aberration correction using an mirror, together with...
We study and analyze the growth of submonolayers Au on Si(111) by a complementary set surface techniques. Specifically, we focus $5\ifmmode\times\else\texttimes\fi{}2$ $\ensuremath{\alpha}\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3}$ structures. determine gold coverage these structures as function temperature means low energy electron diffraction (LEED) microscopy (LEEM). These results are independently calibrated ex-situ ion scattering experiments. This allows us to present phase...
Abstract Charge transport measurements form an essential tool in condensed matter physics. The usual approach is to contact a sample by two or four probes, measure the resistance and derive resistivity, assuming homogeneity within sample. A more thorough understanding, however, requires knowledge of local resistivity variations. Spatially resolved information particularly important when studying novel materials like topological insulators, where current localized at edges,...
Abstract A description of the implementation a completely renewed setup for Physics Bachelor labs is given. The made use latest educational research insights and described from general Dublin descriptors CALOHEE assessment National domain specific reference frame up to concrete learning objectives that we aim in practicals. choice between more open closed discussed. This study makes design therefore mostly tests principles. In general, principles behind have worked students been given need...