Kathrin Küster
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View article: Lithographically Controlled Liquid Metal Diffusion in Graphene: Fabrication and Magnetotransport Signatures of Superconductivity
Lithographically Controlled Liquid Metal Diffusion in Graphene: Fabrication and Magnetotransport Signatures of Superconductivity Open
Metal intercalation in epitaxial graphene enables the emergence of proximity‐induced superconductivity and modified quantum transport properties. However, systematic transport studies of intercalated graphene have been hindered by challeng…
View article: Floating zone growth of large tetragonal Ruddlesden-Popper bilayer nickelate YySr3−yNi2−xAlxO7−δ single crystals
Floating zone growth of large tetragonal Ruddlesden-Popper bilayer nickelate YySr3−yNi2−xAlxO7−δ single crystals Open
The discovery of superconductivity under high pressure in Ruddlesden-Popper (RP) type phase bilayer $${{{{\rm{La}}}}}_{3}{{{{\rm{Ni}}}}}_{2}^{2.5+}{{{{\rm{O}}}}}_{7}$$ and trilayer $${{{{\rm{La}}}}}_{4}{{{{\rm{Ni}}}}}_{3…
View article: Growth dynamics of graphene buffer layer formation on ultra-smooth SiC(0001) surfaces
Growth dynamics of graphene buffer layer formation on ultra-smooth SiC(0001) surfaces Open
In this study, the growth process of epitaxial graphene on SiC was systematically investigated. The transition from the initial buffer layer growth to the formation of the first monolayer graphene domains was studied by various techniques:…
View article: Exploring low-dimensional magnetism in cobalt vanadates, <i>A</i>CoV2O7 (<i>A</i> = Ca, Sr): Crystal growth and magnetic properties of effective spin-1/2 zigzag chains
Exploring low-dimensional magnetism in cobalt vanadates, <i>A</i>CoV2O7 (<i>A</i> = Ca, Sr): Crystal growth and magnetic properties of effective spin-1/2 zigzag chains Open
We report the successful growth of high-quality single crystals of ACoV2O7 (A = Ca, Sr), a quasi-one-dimensional zigzag chain compound containing Co2+ ions, using the optical floating zone method. The crystal growth was stabilized under hi…
View article: Toward Carbon‐Free Cathodes for Fluoride Ion Batteries: Deconvoluting Effects of Active Material and Conductive Additive on Charging and Cyclic Stability
Toward Carbon‐Free Cathodes for Fluoride Ion Batteries: Deconvoluting Effects of Active Material and Conductive Additive on Charging and Cyclic Stability Open
In this study, conductive, fluorine and antimony codoped tin oxide nanoparticles (FATO‐NPs) are highlighted as a possible alternative for conductive carbon additives in fluoride ion batteries, successfully circumventing oxidative side reac…
View article: Pb-intercalated epitaxial graphene on SiC: Full insight into band structure and orbital character of interlayer Pb, and charge transfer into graphene
Pb-intercalated epitaxial graphene on SiC: Full insight into band structure and orbital character of interlayer Pb, and charge transfer into graphene Open
Intercalation is a robust approach for modulating the properties of epitaxial graphene on SiC and stabilizing two-dimensional intercalant layers at the graphene/SiC interface. In this paper, we present synchrotron-based angle resolved phot…
View article: Charge-entropy-stabilized selenide AgxSn1−xSe
Charge-entropy-stabilized selenide AgxSn1−xSe Open
Configurational entropy has been discussed for high entropy alloys and high entropy oxides with multiple metal atoms sharing the same atomic site, where the entropy allows for the stability of a single phase material. Typically, the entrop…
View article: Growth dynamics of graphene buffer layer formation on ultra-smooth SiC(0001) surfaces
Growth dynamics of graphene buffer layer formation on ultra-smooth SiC(0001) surfaces Open
In this study the growth process of epitaxial graphene on SiC was investigated systematically. The transition from the initial buffer layer growth to the formation of the first monolayer graphene domains was investigated by various techniq…
View article: Pb-intercalated epitaxial graphene on SiC: Full insight into band structure and orbital character of interlayer Pb, and charge transfer into graphene
Pb-intercalated epitaxial graphene on SiC: Full insight into band structure and orbital character of interlayer Pb, and charge transfer into graphene Open
Intercalation is a robust approach for modulating the properties of epitaxial graphene on SiC and stabilizing two-dimensional (2D) intercalant layers at the graphene/SiC interface. In this work, we present synchrotron-based angle resolved …
View article: Towards Recycling of All‐Solid‐State Batteries with Argyrodite Sulfide Electrolytes: Insights into Electrolyte and Electrode Degradation in Dissolution‐Based Separation Processes
Towards Recycling of All‐Solid‐State Batteries with Argyrodite Sulfide Electrolytes: Insights into Electrolyte and Electrode Degradation in Dissolution‐Based Separation Processes Open
All‐solid‐state Li‐ion batteries (ASSBs) represent a promising leap forward in battery technology, rapidly advancing in development. Among the various solid electrolytes, argyrodite thiophosphates Li 6 PS 5 X (X=Cl, Br, I) stand out due to…
View article: Effect of particle size on the slurry-based processability and conductivity of <i>t</i> -Li <sub>7</sub> SiPS <sub>8</sub>
Effect of particle size on the slurry-based processability and conductivity of <i>t</i> -Li <sub>7</sub> SiPS <sub>8</sub> Open
Slurry-processed t -Li 7 SiPS 8 SE-sheets with larger thiophosphate particles show enhanced ionic conductivity and Li diffusivity, highlighting the importance of SE morphology and microstructure on the performance of all-solid-state batter…
View article: Charge transfer between van der Waals coupled metallic 2D layers
Charge transfer between van der Waals coupled metallic 2D layers Open
Charge transfer in a K/graphene/Pb-monolayer heterostack on SiC: Approximately 44% of the charge donated from the K adlayer is transferred into the next-nearest neighbour Pb-layer, while the rest remains in the graphene.
View article: Synthesis of Two Structurally Different MgO Films Containing Dioxygen Species: Dioxygen Embedded at Grain Boundaries, and as Components of a Superfilled Rock Salt Structure
Synthesis of Two Structurally Different MgO Films Containing Dioxygen Species: Dioxygen Embedded at Grain Boundaries, and as Components of a Superfilled Rock Salt Structure Open
Magnesium oxide films prepared as monolayer, amorphous, and epitaxial films have different properties such as semiconducting, ferromagnetic, and dielectric behavior, respectively. Understanding the variation in these properties requires de…
View article: Realization of a classical Ruddlesden Popper type bilayer nickelate in Sr3Ni2−xAlxO7−δ with unusual Ni4+
Realization of a classical Ruddlesden Popper type bilayer nickelate in Sr3Ni2−xAlxO7−δ with unusual Ni4+ Open
The discovery of 80 K superconductivity in bilayer La 3 Ni 2 O 7 at pressures greater than 14 GPa presents a unique opportunity to study a novel class of high-temperature superconductors. Therefore, other bilayer nickelates following the c…
View article: Decoupling of Light and Dark Reactions in a 2D Niobium Tungstate for Light-Induced Charge Storage and On-Demand Hydrogen Evolution
Decoupling of Light and Dark Reactions in a 2D Niobium Tungstate for Light-Induced Charge Storage and On-Demand Hydrogen Evolution Open
The direct coupling of light harvesting and charge storage in a single material opens new avenues to light storing devices. Here we demonstrate the decoupling of light and dark reactions in the two-dimensional layered niobium tungstate (TB…
View article: Electronic Structure and Kohn-Luttinger Superconductivity of Heavily-Doped Single-Layer Graphene
Electronic Structure and Kohn-Luttinger Superconductivity of Heavily-Doped Single-Layer Graphene Open
The existence of superconductivity (SC) in graphene appears to be established in both twisted and non-twisted multilayers. However, whether their building block, single-layer graphene (SLG), can also host SC remains an open question. Earli…
View article: Sharp quantum phase transition in the frustrated spin-1/2 Ising chain antiferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CaCoV</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>7</mml:mn></mml:msub></mml:mrow></mml:math>
Sharp quantum phase transition in the frustrated spin-1/2 Ising chain antiferromagnet Open
We report on a quantum critical behavior in the quasi-1D spin-1/2 zigzag frustrated chain antiferromagnet CaCoV2O7, induced by an applied magnetic field. Below TN=3.3 K our zero-field neutron diffraction studies revealed the up-up-down-dow…
View article: Realization of a classical Ruddlesden Popper type bilayer nickelate in Sr$_3$Ni$_{2-x}$Al$_{x}$O$_{7-δ}$ with unusual Ni$^{4+}$
Realization of a classical Ruddlesden Popper type bilayer nickelate in Sr$_3$Ni$_{2-x}$Al$_{x}$O$_{7-δ}$ with unusual Ni$^{4+}$ Open
The discovery of 80 K superconductivity in bilayer La$_3$Ni$_2$O$_7$ at pressures greater than 14 GPa presents a unique opportunity to study a novel class of high-temperature superconductors. Therefore, other bilayer nickelate following th…
View article: Direct visualization of stacking-selective self-intercalation in epitaxial Nb1+xSe2 films
Direct visualization of stacking-selective self-intercalation in epitaxial Nb1+xSe2 films Open
Two-dimensional (2D) van der Waals (vdW) materials offer rich tuning opportunities generated by different stacking configurations or by introducing intercalants into the vdW gaps. Current knowledge of the interplay between stacking polytyp…
View article: Direct Recycling of β‐Li<sub>3</sub>PS<sub>4</sub>‐Based All‐Solid‐State Li‐Ion Batteries: Interactions of Electrode Materials and Electrolyte in a Dissolution‐Based Separation Process
Direct Recycling of β‐Li<sub>3</sub>PS<sub>4</sub>‐Based All‐Solid‐State Li‐Ion Batteries: Interactions of Electrode Materials and Electrolyte in a Dissolution‐Based Separation Process Open
All‐solid‐state batteries (ASSB) are currently developed at high pace and show a strong potential for market introduction within the next years. Though their performance has improved considerably over the last years, investigation of their…
View article: Determination and investigation of defect domains in multi-shape monolayer tungsten disulfide
Determination and investigation of defect domains in multi-shape monolayer tungsten disulfide Open
Monolayer WS 2 synthesized in different shapes varying the growth conditions. They display a heterogeneity of defect distribution and concentration, influencing the electronic and optical properties of each domain within the single crystal.
View article: Direct observation of the interplay between stacking polytypes and self-intercalation in epitaxial Nb1+xSe2 films
Direct observation of the interplay between stacking polytypes and self-intercalation in epitaxial Nb1+xSe2 films Open
View article: Recycling of beta-Li3PS4-based all-solid-state Li-ion batteries: Interactions of electrode materials and electrolyte in a dissolution-based separation process
Recycling of beta-Li3PS4-based all-solid-state Li-ion batteries: Interactions of electrode materials and electrolyte in a dissolution-based separation process Open
All-solid-state batteries are currently developed at high pace and show a strong potential for market introduction within the next years. Though their performance has improved considerably over the last years, investigation of their sustai…
View article: Phase formation in hole- and electron-doped rare-earth nickelate single crystals
Phase formation in hole- and electron-doped rare-earth nickelate single crystals Open
The recent discovery of superconductivity in hole-doped infinite-layer nickelates has triggered a great interest in the synthesis of novel nickelate phases, which have primarily been examined in thin film samples. Here, we report the high-…
View article: Domain Boundary Formation Within an Intercalated Pb Monolayer Featuring Charge‐Neutral Epitaxial Graphene
Domain Boundary Formation Within an Intercalated Pb Monolayer Featuring Charge‐Neutral Epitaxial Graphene Open
The synthesis of new graphene‐based quantum materials by intercalation is an auspicious approach. However, an accompanying proximity coupling depends crucially on the structural details of the new heterostructure. It is studied in detail t…
View article: Phase formation in hole- and electron-doped rare-earth nickelate single crystals
Phase formation in hole- and electron-doped rare-earth nickelate single crystals Open
The recent discovery of superconductivity in hole-doped infinite-layer nickelates has triggered a great interest in the synthesis of novel nickelate phases, which have primarily been examined in thin film samples. Here, we report the high-…
View article: CSD 2222205: Experimental Crystal Structure Determination
CSD 2222205: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Chemical stability and functionality of Al2O3 artificial solid electrolyte interphases on alkali metals under open circuit voltage conditions
Chemical stability and functionality of Al2O3 artificial solid electrolyte interphases on alkali metals under open circuit voltage conditions Open
We studied chemical stability of atomic layer deposition-grown Al2O3 artificial solid electrolyte interphases (SEIs) on lithium and sodium upon contact with liquid electrolyte by electrochemical impedance spectroscopy (EIS) and in the case…
View article: Synthesis and physical properties of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>LaNiO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> crystals
Synthesis and physical properties of crystals Open
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View article: Evaporated Self‐Assembled Monolayer Hole Transport Layers: Lossless Interfaces in <i>p‐i‐n</i> Perovskite Solar Cells
Evaporated Self‐Assembled Monolayer Hole Transport Layers: Lossless Interfaces in <i>p‐i‐n</i> Perovskite Solar Cells Open
Engineering of the interface between perovskite absorber thin films and charge transport layers has fueled the development of perovskite solar cells (PSCs) over the past decade. For p‐i‐n PSCs, the development and adoption of hole transpor…