A5028823332- Crystal Structures and Properties
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Inorganic Chemistry and Materials
- Solid-state spectroscopy and crystallography
- Inorganic Fluorides and Related Compounds
- Magnetic properties of thin films
- 2D Materials and Applications
- Topological Materials and Phenomena
- Physics of Superconductivity and Magnetism
- Metal complexes synthesis and properties
- Luminescence Properties of Advanced Materials
- Organometallic Complex Synthesis and Catalysis
- Ionic liquids properties and applications
- Quantum and electron transport phenomena
- Crystallography and molecular interactions
- Coordination Chemistry and Organometallics
- Graphene research and applications
- Phase-change materials and chalcogenides
- Theoretical and Computational Physics
- Surface and Thin Film Phenomena
- Advanced Condensed Matter Physics
- Electronic and Structural Properties of Oxides
- Metal-Catalyzed Oxygenation Mechanisms
- MXene and MAX Phase Materials
Radboud University Nijmegen
2016-2021
Radboud Institute for Molecular Life Sciences
2020-2021
Radboud University Medical Center
2020-2021
Karlsruhe Institute of Technology
2018-2019
University of Bonn
2010-2018
Universität Hamburg
2009-2015
University of Southern Denmark
2015
Center for Free-Electron Laser Science
2009-2014
A combined experimental and theoretical study of doping individual Fe atoms into ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ is presented. It shown through a scanning tunneling microscopy that single initially located at hollow sites on top the surface (adatoms) can be incorporated subsurface layers by thermally activated diffusion. Angle-resolved photoemission spectroscopy in combination with ab initio calculations suggest behavior changes from electron donation for adatom to neutral or acceptance...
Single-layer ${\mathrm{TaS}}_{2}$ is epitaxially grown on Au(111) substrates. The resulting two-dimensional crystals adopt the $1H$ polymorph. electronic structure determined by angle-resolved photoemission spectroscopy and found to be in excellent agreement with density functional theory calculations. single-layer strongly $n$ doped, a carrier concentration of $0.3(1)$ extra electrons per unit cell. No superconducting or charge wave state observed scanning tunneling microscopy at...
3D point cloud semantic segmentation plays an essential role in fine-grained scene understanding from photogrammetry to autonomous driving. Although recent efforts have been made push the forward, many solutions cannot generalize well new data with different sensor configurations. For example, when transferring model learned terrestrial laser scanning (TLS) mobile (MLS) data, performance drops dramatically. Besides, rich-labeled is usually required. However, labeling time-consuming and...
Amazingly stable: The bis(guanidine) ligand N1,N3-bis[bis(2,2,6,6-tetramethylpiperidin-1-yl)methylen]propan-1,3-diamine stabilizes the first bis(μ-oxo)dicopper(III) complex (see figure) at room temperature. This is characterized in ground state and optical excited by a combination of EXAFS resonance Raman spectroscopy. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...
Abstract Charge transfers resulting from weak bondings between two-dimensional materials and the supporting substrates are often tacitly associated with their work function differences. In this context, could be normally doped at relatively low levels. Here, we demonstrate how even hybridization can lead to an apparent heavy doping, using example of monolayer 1H-TaS 2 grown on Au(111). Ab-initio calculations show that sizable changes in Fermi areas arise, while transferred charge substrate...
The band structure, intra- and interband scattering processes of the electrons at surface a bismuth-bilayer on Bi$_2$Se$_3$ have been experimentally investigated by low-temperature Fourier-transform scanning tunneling spectroscopy. observed complex quasiparticle interference patterns are compared to simulation based spin-dependent joint density states approach using surface-localized spectral function calculated from first principles as only input. Thereby, origin interferences can be traced...
The bromine‐rich bromidoplatinates(IV) [NBu 3 Me] 2 [Pt Br 10 ](Br ) ( 1 and were prepared by reaction of PtBr 4 elemental bromine in the ionic liquid [MeBu N][N(Tf) ] [N(Tf) = bis(trifluoromethylsulfonyl)amide]. Both contain 2– anions + cations as voluminous building units with an almost identical structural arrangement very similar unit cells. difference title compounds is related to specific number molecules that link three‐dimensional networks. Whereas relatively stable under inert...
Through a combination of experimental techniques we show that the topmost layer topological insulator TlBiSe2 as prepared by cleavage is formed irregularly shaped Tl islands at cryogenic temperatures and mobile atoms room temperature. No trivial surface states are observed in photoemission low temperatures, which suggests these cannot be regarded clear termination. The state is, however, clearly resolved experiments. This interpreted direct evidence its self-protection shows robust nature...
We describe the design and performance of a scanning tunneling microscope (STM) that operates at base temperature 30 mK in vector magnetic field. The cryogenics is based on an ultra-high vacuum (UHV) top-loading wet dilution refrigerator contains magnet allowing for fields up to 9 T perpendicular 4 parallel sample. STM placed multi-chamber UHV system, which allows situ preparation exchange samples tips. entire system rests 150-ton concrete block suspended by pneumatic isolators, housed...
The structural and electronic properties of FeSe ultrathin layers on $\mathrm{B}{\mathrm{i}}_{2}\mathrm{S}{\mathrm{e}}_{3}$ have been investigated with a combination scanning tunneling microscopy spectroscopy angle-resolved photoemission spectroscopy. multilayers, which are predominantly 3--5 monolayers (MLs) thick, exhibit hole pocket-like electron band at $\overline{\mathrm{\ensuremath{\Gamma}}}$ dumbbell-like feature $\overline{M}$, similar to multilayers $\mathrm{SrTi}{\mathrm{O}}_{3}$....
Abstract The reactions of antimony and tellurium in molten GaCl 3 or AlCl the presence MCl (M = Li, Na, In, Cu) SbCl as oxidant yield (Sb 7 Te 8 )[Ga 2 Cl ] [GaCl 4 ( 1 ), Na(Sb )[GaCl 6 ) )[AlCl ). All compounds form orange, highly air sensitive crystals, which grow inside a viscous melt. crystal structures are built from – , [Ga [AlCl anions discrete 5+ cationic clusters. cations have structure two cubes sharing one corner alternating Sb/Te occupancy atom positions. central position at...
Abstract The reactions of elemental antimony, tellurium, selenium and sulfur as well antimony telluride sulfide in melts composed GaCl 3 /SbCl /ACl (A = Cu + , Ag PPh 4 ) yielded Ag(Sb 7 Te 8 )[GaCl ] 6 ( 1 ), (Sb Se 2 [Ga Cl S ). SbCl plays the role oxidant, Lewis acidic chloride ion acceptor. All compounds form orange, air‐sensitive crystals. crystal structures consist discrete, double‐cube‐shaped, mixed antimony–chalcogen cationic clusters 5+ 3+ . anions are discrete chloridogallate [GaCl...
The bromine‐rich bromido metallates [BMIm] 2 [SnBr 6 ] · (Br ) ( 1 and [MnBr(18‐crown‐6)] 4 4.5 were prepared by the reaction of MgBr or MnBr with SnBr , 18‐crown‐6, elemental bromine in ionic liquids [BMIm][N(Tf) [MeBu 3 N][N(Tf) {BMIm: butyl methyl imidazolium, N(Tf) : bis(trifluoromethylsulfonyl)amide}. This sequence reactions was motivated previous studies system ZnBr /Br /18‐crown‐6 here expanded to divalent cations comparable diameter (i.e., Zn 2+ 74 pm, Mg 65 pm; Mn 91 pm). In...
A structurally ordered spin glass Spin glasses that form in disordered materials such as magnetic alloys have locally varying patterns, and their relaxation occurs over time scales spanning many orders of magnitude. Kamber et al. used spin-polarized scanning tunneling microscopy to image the magnetism on (0001) surface thick, single-crystal films neodymium a function temperature field. Despite lack structural disorder, they found spectral distribution degenerate wave vectors, or Q states,...
We study the electronic screening mechanisms of effective Coulomb on-site repulsion in hole-doped Sr(14)Cu(24)O(41) compared to undoped La(6)Ca(8)Cu(24)O(41) using polarization dependent high-resolution resonant inelastic x-ray scattering at Cu M edges. By measuring energy and spin excitations, we estimate superexchange hopping matrix element energies along rungs legs, respectively. Interestingly, hole doping locally screens reducing it by as much 25%. suggest that increased ratio kinetic...
The reactions of tellurium or selenium with bismuth antimony in chloridogallate and iodidoaluminate melts the presence group 15 trihalides as weak oxidants yielded compounds (Sb2Te2)[GaCl4] (1), (Sb2Te2)I[AlI4] (2), (Bi2Te2)Cl[GaCl4] (3a), (Bi2Se2)Cl[GaCl4] (3b), (Sb3Te4)[GaCl4] (4), (SbTe4)[Ga2Cl7] (5). In crystal structures one-dimensional polymeric cations (Sb2Te2+)n (Sb2Te22+)n (Bi2Te22+)n (Bi2Se22+)n (Sb3Te4+)n (SbTe4+)n (5) are present. cationic strands 2, 3a, 3b, 4 consist...
Abstract The reaction of antimony telluride with trichloride in a GaCl 3 ‐rich copper(I) tetrachloridogallate melt the presence antimony(III) oxide yields Cu(Sb 7 Te 8 )[GaCl 4 ] 6 ( 1 ) as dark‐orange, moisture sensitive crystals. SbCl acts oxidant, medium, which provides weakly coordinating [GaCl – anions. discrete, double cube shaped (Sb 5+ clusters show only small distortions from ideal D d symmetry. A remarkable structural feature is linear coordination Cu + by Cl atoms two neighboring...
Abstract Gallium antimony chloride oxide, Ga 2 SbCl 7 O, is formed in a GaCl 3 ‐based melt containing tellurium, antimony, , and Sb O form of colorless, highly hygroscopic crystals. The crystal structure consists discrete molecules, which bent SbOCl unit coordinated by two groups. atoms coordinate the oxygen atom, resulting planar [Ga SbO] central building unit. A distinct stereochemical lone pair effect present at atom. In crystal, molecules are packed motif hexagonal closest packing. DFT...
There is immense interest in how the local environment influences electronic structure of materials at single-layer limit. We characterize moir\'e induced spatial variations situ grown monolayer ${\mathrm{V}}_{2}{\mathrm{S}}_{3}$ on Au(111) by means low-temperature scanning tunneling microscopy and spectroscopy. observe a long-range modulation integrated density states (LDOS), quantify this with respect to superstructure for multiple orientations substrate. Scanning spectroscopy reveals...