A. Koitzsch
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View article: Influence of pressure on the properties of the multigap type-I superconductor BeAu
Influence of pressure on the properties of the multigap type-I superconductor BeAu Open
We report on studies of the superconducting and normal-state properties of the noncentrosymmetric superconductor BeAu under hydrostatic pressure conditions. The room-temperature equation of state (EOS) reveals the values of the bulk modulu…
View article: Bulk and surface electron scattering in disordered <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Te</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> probed by quasiparticle interference
Bulk and surface electron scattering in disordered probed by quasiparticle interference Open
We investigated the electronic properties of the topological insulator Bi2Te3 by scanning tunneling microscopy and spectroscopy at low temperature. We obtained high-resolution quasiparticle interference data of the topological surface Dira…
View article: Influence of pressure on properties of multi-gap type-I superconductor BeAu
Influence of pressure on properties of multi-gap type-I superconductor BeAu Open
We report on studies of the superconducting and normal state properties of the noncentrosymmetric superconductor BeAu under hydrostatic pressure conditions. The room-temperature equation of state (EOS) reveals the values of the bulk modulu…
View article: Bulk and surface electron scattering in disordered Bi$_{2}$Te$_{3}$ probed by quasiparticle interference
Bulk and surface electron scattering in disordered Bi$_{2}$Te$_{3}$ probed by quasiparticle interference Open
We investigated the electronic properties of the topological insulator Bi$_{2}$Te$_{3}$ by scanning tunneling microscopy and spectroscopy at low temperature. We obtained high-resolution quasiparticle interference data of the topological su…
View article: Exploring the heteroanionic 2D materials RhSeCl and RhTeCl as promising semiconductor materials
Exploring the heteroanionic 2D materials RhSeCl and RhTeCl as promising semiconductor materials Open
Heteroanionic materials show potential as 2D semiconductors due to their tunable band gaps, making them excellent candidates for photocatalytic water splitting applications.
View article: Charge compensation in a layered van der Waals NiPS<sub>3</sub> host through various cationic intercalations
Charge compensation in a layered van der Waals NiPS<sub>3</sub> host through various cationic intercalations Open
Electrochemical cation intercalation into 2D NiPS 3 leads either to reduction of the (P 2 S 6 ) 4− units (Li example) or Ni cations (Na example), or causes electrochemical reduction and decomposition of EMIM cations within the van der Waal…
View article: Metal–metal bonding, electronic excitations, and strong resonance Raman effect in 2D layered α-MoCl<sub>3</sub>
Metal–metal bonding, electronic excitations, and strong resonance Raman effect in 2D layered α-MoCl<sub>3</sub> Open
Covalent bonding between transition metal atoms is a common phenomenon in honeycomb lattices of layered materials, which strongly affects their electronic and magnetic properties. This work presents a detailed spectroscopic study of α -MoC…
View article: Formation of laser-induced periodic surface structures on Zr-based bulk metallic glasses with different chemical composition
Formation of laser-induced periodic surface structures on Zr-based bulk metallic glasses with different chemical composition Open
View article: Intertwined electronic and magnetic structure of the van-der-Waals antiferromagnet Fe2P2S6
Intertwined electronic and magnetic structure of the van-der-Waals antiferromagnet Fe2P2S6 Open
Many unusual and promising properties have been reported recently for the transition metal trichalcogenides of the type M PS 3 ( M = V, Mn, Fe, Ni ...), such as maintaining magnetic order to the atomically thin limit, ultra-sharp many-body…
View article: Charge transfer at the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>α</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mi>RuCl</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>/MnPc interface
Charge transfer at the /MnPc interface Open
The interface of manganese(II) phtalocyanine (MnPc) with an α-RuCl3 single crystal is studied by means of photoelectron spectroscopy. The organic molecule was evaporated on top of an in situ cleaved α-RuCl3 bulk crystal in steps. The work …
View article: Work Function Engineering of Thin α‐RuCl<sub>3</sub> by Argon Sputtering
Work Function Engineering of Thin α‐RuCl<sub>3</sub> by Argon Sputtering Open
α‐RuCl 3 is a candidate material for the realization of a Kitaev spin liquid with envisioned applications for quantum computing. It is a van‐der‐Waals material with in‐plane honeycomb lattice equivalent to the Cr X 3 ( X = Cl, Br, I) type …
View article: Low-temperature enhancement of ferromagnetic Kitaev correlations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>α</mml:mi><mml:mo>−</mml:mo><mml:mi>Ru</mml:mi><mml:msub><mml:mi>Cl</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
Low-temperature enhancement of ferromagnetic Kitaev correlations in Open
Kitaev-type interactions between neighbouring magnetic moments emerge in the\nhoneycomb material ${\\alpha}$-RuCl3. It is debated however whether these Kitaev\ninteractions are ferromagnetic or antiferromagnetic. With electron energy loss\…
View article: Spectromicroscopic measurements of electronic structure variations in atomically thin WSe2
Spectromicroscopic measurements of electronic structure variations in atomically thin WSe2 Open
Atomically thin transition metal dichalcogenides (TMDCs) are promising candidates for implementation in next generation semiconducting devices, for which laterally homogeneous behavior is needed. Here, we study the electronic structure of …
View article: Nonlocal dielectric function and nested dark excitons in MoS2
Nonlocal dielectric function and nested dark excitons in MoS2 Open
Their exceptional optical properties are a driving force for the persistent interest in atomically thin transition metal dichalcogenides such as MoS 2 . The optical response is dominated by excitons. Apart from the bright excitons, which d…
View article: Colloidal PbS nanoplatelets synthesized <i>via</i> cation exchange for electronic applications
Colloidal PbS nanoplatelets synthesized <i>via</i> cation exchange for electronic applications Open
Colloidal PbS nanoplatelets synthesized via cation exchange from CuS nanoplatelets were ligand exchanged forming stable inks applied in field-effect transistors.
View article: Site-selective spectroscopy with depth resolution using resonant x-ray reflectometry
Site-selective spectroscopy with depth resolution using resonant x-ray reflectometry Open
View article: Nearest-neighbor Kitaev exchange blocked by charge order in electron doped $\alpha$-RuCl$_{3}$
Nearest-neighbor Kitaev exchange blocked by charge order in electron doped $\alpha$-RuCl$_{3}$ Open
A quantum spin-liquid might be realized in $\alpha$-RuCl$_{3}$, a honeycomb-lattice magnetic material with substantial spin-orbit coupling. Moreover, $\alpha$-RuCl$_{3}$ is a Mott insulator, which implies the possibility that novel exotic …
View article: Nearest-neighbor Kitaev exchange blocked by charge order in electron doped $α$-RuCl$_{3}$
Nearest-neighbor Kitaev exchange blocked by charge order in electron doped $α$-RuCl$_{3}$ Open
A quantum spin-liquid might be realized in $α$-RuCl$_{3}$, a honeycomb-lattice magnetic material with substantial spin-orbit coupling. Moreover, $α$-RuCl$_{3}$ is a Mott insulator, which implies the possibility that novel exotic phases occ…
View article: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>J</mml:mi><mml:mi>eff</mml:mi></mml:msub></mml:math>Description of the Honeycomb Mott Insulator<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>α</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mi>RuCl</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Description of the Honeycomb Mott Insulator Open
Novel ground states might be realized in honeycomb lattices with strong spin-orbit coupling. Here we study the electronic structure of α-RuCl_{3}, in which the Ru ions are in a d^{5} configuration and form a honeycomb lattice, by angle-res…
View article: Nesting-driven multipolar order in CeB6 from photoemission tomography
Nesting-driven multipolar order in CeB6 from photoemission tomography Open
View article: Universal electronic structure of polar oxide hetero-interfaces
Universal electronic structure of polar oxide hetero-interfaces Open
View article: Electronic depth profiles with atomic layer resolution from resonant X-ray reflectivity
Electronic depth profiles with atomic layer resolution from resonant X-ray reflectivity Open