P. Lemmens

Raman spectroscopic study of phonon dynamics and structural evolution in BaBiO3

Alexander Yu. Glamazda, V. P. Gnezdilov, A. V. Peschanskiı̆, P. Lemmens

In the present study, we explore the phonon dynamics of barium bismuthate (BaBiO3) in a broad temperature range of 5–300 K using Raman spectroscopy. Thereby, the interaction between lattice vibrations, electronic behavior, and the structural phase transition of BaBiO3 is studied, issues …

ua, de (code pays fourni par la source)

Comparing two isostructural Weyl semimetals with respect to phonon dynamics and resonance phenomena

V. P. Gnezdilov, Silvia Hofmann, Florian Büscher, Denis Ukolov et autres

The isostructural Weyl semimetals PdGa and RhSi allow to probe the response of lattice and electronic degrees of freedom to symmetry, in particular the role of chirality in anomalous electron phonon coupling. We observe an unconventional anharmonicity in the temperature dependence of …

de, kr (code pays fourni par la source)

Lattice softening and diffusive dynamics in the polar metal LiReO 3

Kantaro Murayama, Ryota Masuki, Cédric Tassel, Hideaki Sakai et autres

Polar metals, characterized by the nontrivial coexistence of metallicity and polar structural order, define an emerging frontier in quantum materials research. However, the interplay between their structural phase transitions and fluctuation dynamics remains poorly understood. Here, we reveal distinct diffusive dynamics in …

jp, de, fr, us (code pays fourni par la source)

Comparing two isostructural Weyl semimetals: Structured light, magnetic fields, resonance phenomena, and exotic phonon dynamics

V. P. Gnezdilov, Silvia Hofmann, Florian Büscher, Denis Ukolov et autres

kr, de (code pays fourni par la source)

Synthesis of silver nanoparticles and their attachment to a zinc oxide–iron oxide hybrid structure: analyte-mediated enhanced peroxidase-like activity for colorimetric detection

Melisew Tadele Alula, Fahime Vetr, Maximilian Gislary Mligo, P. Lemmens

from tap and borehole ground water shows its practicality for real sample analysis. The green reduction method and deposition of AgNPs could be generalized to other metal ions with different reduction potentials from those of ferrous ions that favor reduction.

Botswana, ir, de (code pays fourni par la source)

Tailoring Momentum and Information Transfer of Structured Light to Adapted Liquid Crystals

P. Lemmens, Angela Möller

High Resolution Image Download MS PowerPoint Slide We report on an experimental assessment of the generally weak coupling of the electromagnetic phases of structured light to matter. Using a systematic study of a liquid crystal series including plasmonic particles, we optimized the …

ua, de (code pays fourni par la source)

Evidence of Ferroelectric Distortions in Topological Crystalline Insulators via Transverse Thermoelectric Measurements

Bin He, Denis Ukolov, Sharona Horta, Krishnendu Maji et autres

The transverse thermoelectric (Nernst) effect is a powerful probe for studying the electronic and structural properties of materials. In this study, we employ transverse thermoelectric measurements to investigate the ferroelectric distortion in the topological crystalline insulator (TCI) Pb 0.60 Sn 0.40 Te, …

in, de, ua, at, us, lu, es (code pays fourni par la source)

Strain Effects in Bernal-Stacked Multi-Layer Graphene

L. Bockhorn, Hannes Kakuschke, Lars Thole, Denis Ukolov et autres

High Resolution Image Download MS PowerPoint Slide Graphene is primarily known for its unique electrical and optical properties, emerging in monolayer and bilayer structures. Recently, Bernal stacked multilayer graphene flakes with more than three layers, attracting increasing interest. In contrast to monolayers, …

de, ua, kr (code pays fourni par la source)

Gold nanoparticles loaded filter paper: A recyclable nanozyme for colorimetric determination of Hg2+ in tap water and beef

Melisew Tadele Alula, P. Lemmens, Nicolette R. Hendricks‐Leukes, Tiny Motalaote et autres

Botswana, de, Afrique du Sud (code pays fourni par la source)

Charge-ordering and spin-dimerization transition in CuIr 2 S 4 : Lattice dynamics confirms octamer correlations

V. P. Gnezdilov, Alexander Yu. Glamazda, V. Tsurkan, P. Lemmens

In the spinel ${\mathrm{CuIr}}_{2}{\mathrm{S}}_{4}$ an exotic, orbitally driven metal-insulator (MI) transition is observed at ${T}_{\mathrm{MI}}\ensuremath{\sim}230\phantom{\rule{4pt}{0ex}}\mathrm{K}$. However, spectroscopic investigations presently do not agree with respect to the role of related lattice distortions and dynamic effects. Here, we present a detailed study of single-crystalline …

ua, de, md (code pays fourni par la source)

Confinement of magnetic solitons and edge states in a van der Waals material: FeOCl

Martin Panthöfer, Stefanie Berinskat, Fabian Predelli, P. Lemmens et autres

This paper reports that domain-wall-like modes govern the magnetic response of the van der Waals material FeOCl. Due to boundaries, these excitations condense into an unconventional magnetic order with a diffusional dynamics as probed by M\"ossbauer spectroscopy and Raman scattering. These results …

de (code pays fourni par la source)

Configuration of the dimolybdate in salt inclusion type of compounds, Cs2Mo2O7 ⋅ CsX (X=Cl, Br, and I)

A. Weber, Ksenia Denisova, P. Lemmens, Angela Möller

Abstract Cs2Mo2O7 ⋅ CsI is obtained as a member of the series Cs2Mo2O7 ⋅ CsX with X=Cl, Br, and I from the synthesis of Cs2MoO4 with MoO3 and CsX. At room temperature, the compounds crystallize in the space group P63/mmc with the …

de (code pays fourni par la source)