A5085571295- 2D Materials and Applications
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Graphene research and applications
- Quantum Dots Synthesis And Properties
- Magnetic properties of thin films
- Heusler alloys: electronic and magnetic properties
- Gas Sensing Nanomaterials and Sensors
- Quantum and electron transport phenomena
- Chalcogenide Semiconductor Thin Films
- Nanowire Synthesis and Applications
- Boron and Carbon Nanomaterials Research
- Diamond and Carbon-based Materials Research
- Mechanical and Optical Resonators
- Electronic and Structural Properties of Oxides
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Physics of Superconductivity and Magnetism
- Acoustic Wave Resonator Technologies
- Magnetic and transport properties of perovskites and related materials
- Solid-state spectroscopy and crystallography
- Luminescence Properties of Advanced Materials
University of Chemistry and Technology, Prague
2022-2025
Leibniz University Hannover
2023
The layered, air-stable van der Waals antiferromagnetic compound CrSBr exhibits pronounced coupling among its optical, electronic, and magnetic properties. As an example, exciton dynamics can be significantly influenced by lattice vibrations through exciton-phonon coupling. Using low-temperature photoluminescence spectroscopy, we demonstrate the effective between excitons phonons in nanometer-thick CrSBr. By careful analysis, identify that satellite peaks predominantly arise from interaction...
Abstract Inkjet printing is a cost-effective and scalable way to assemble colloidal materials into desired patterns in vacuum- lithography-free manner. Two-dimensional (2D) nanosheets are promising material category for printed electronics because of their compatibility with solution processing stable ink formulations as well wide range electronic types from metal, semiconductor insulator. Furthermore, dangling bond-free surface enables atomically thin, electronically-active thin films van...
Magnetic van der Waals (vdW) materials possess versatile spin configurations stabilized in reduced dimensions. One magnetic order is the interlayer antiferromagnetism A-type vdW antiferromagnet, which may be effectively modified by field, stacking order, and thickness scaling. However, atomically revealing orientation antiferromagnet highly challenging, because most of material candidates exhibit an insulating ground state or instability ambient conditions. Here, we report layer-dependent...
van der Waals heterostructures of two-dimensional materials have unveiled frontiers in condensed matter physics, unlocking unexplored possibilities electronic and photonic device applications. However, the investigation wide-gap, high-κ layered dielectrics for devices based on structures has been relatively limited. In this work, we demonstrate an easily reproducible synthesis method rare-earth oxyhalide LaOBr, exfoliate it as a 2D material with measured static dielectric constant 9 wide...
Recently, two-dimensional (2D) van der Waals (vdW) magnetic materials have emerged as a promising platform for studying exchange bias (EB) phenomena due to their atomically flat surfaces and highly versatile stacking configurations. Although complex spin configurations between 2D vdW interfaces introduce challenges in understanding underlying mechanisms, they can offer more possibilities realizing effective manipulations. In this study, we present spin-orthogonal arranged Fe3GaTe2...
Abstract 2D magnets represent material systems in which magnetic order and topological phase transitions can be observed. Based on these phenomena, novel types of computing architectures magnetoelectronic devices envisaged. Unlike conventional films, their magnetism is independent the substrate interface qualities, properties manifest even formally bulk single crystals. However, layered materials rarely reported often due to weak exchange interactions anisotropy, low transition temperatures....
Competition between exchange interactions and magnetocrystalline anisotropy may bring new magnetic states that are of great current interest. An applied hydrostatic pressure can further be used to tune their balance. In this work, we investigate the magnetization process a biaxial antiferromagnet in an external field along easy axis. We find single metamagnetic transition Ising type observed material under ambient transforms into two transitions, first-order spin-flop followed by...
α-RuCl3 is a layered transition metal halide that possesses range of exotic magnetic, optical, and electronic properties including fractional excitations indicative proximate Kitaev quantum spin liquid (QSL). While previous reports have explored these on idealized single crystals or mechanically exfoliated samples, the scalable production nanosheets has not yet been demonstrated. Here, we perform liquid-phase exfoliation (LPE) through an electrochemically assisted approach, which yields...
2D magnetic semiconductors, which intrinsically couple a rich landscape of orders with tightly bound electron-hole pairs (excitons), present an exciting platform to investigate the interplay between optical and phenomena at atomic scale. In such systems, strength magneto-optical effects determines how deeply properties can be revealed. Here, we report observation remarkably strong magneto-excitonic in semiconductor CrSBr that allow probing its order unprecedented sensitivity. By...
Electronic structure modification via intercalative electron-doping of α-RuCl3, a two-dimensional (2D) transition metal halide, imparts unique optoelectronic properties such as near-infrared (NIR) absorption. While bulk-scale RuCl3 nanosheet production has been established using conventional liquid phase exfoliation, printed devices compatible with scalable manufacturing remain unexplored. Here, we demonstrate fully aerosol-jet-printed (AJP) NIR photodetectors based on megasonically...
Abstract An ultra‐sensitive nanoscale magnetism sensing of van der Waals layered CrSBr is demonstrated by employing optical whispering‐gallery‐mode (WGM) resonances in a self‐rolled‐up microcavity. nanoflakes with and without intercalation are probed monitoring the WGM resonant modes shift as function magnetic field intensity temperature, revealing presence ferromagnetic (FM) antiferromagnetic (AFM) order. The minimum detectable amount reaches femtogram scale, detection limit low 1.25 × 10...
2D semiconducting transition metal dichalcogenides (TMDCs) are highly promising materials for future spin- and valleytronic applications exhibit an ultrafast response to external (optical) stimuli which is essential optoelectronics. Colloidal nanochemistry on the other hand emerging alternative synthesis of TMDC nanosheet (NS) ensembles, allowing control reaction via tunable precursor ligand chemistry. Up now, wet-chemical colloidal syntheses yielded intertwined/agglomerated NSs with a large...
Abstract Recent studies dedicated to layered van der Waals crystals have attracted significant attention magnetic atomically thin offering unprecedented opportunities for applications in innovative magnetoelectric, magneto‐optic, and spintronic devices. The active search original platforms the low‐dimensional magnetism study has emphasized entirely new properties of two dimensional (2D) semiconductor CrSBr. Herein, first time, electrochemical exfoliation bulk CrSBr a non‐aqueous environment...
Abstract 2D metal monochalcogenides have recently attracted interest for photoelectrochemical (PEC) applications in aqueous electrolytes. Their optical bandgap the visible and near‐infrared spectral region is adequate energy conversion photodetection/sensing. large surface‐to‐volume ratio guarantees that charge carriers are photogenerated at material/electrolyte interface, where redox reactions occur, minimizing recombination processes. However, solution‐processed photoelectrodes based on...
Competition between exchange interactions and magnetocrystalline anisotropy may bring new magnetic states that are of great current interest. An applied hydrostatic pressure can further be used to tune their balance. In this work we investigate the magnetization process a biaxial antiferromagnet in an external field along easy axis. We find single metamagnetic transition Ising type observed material under ambient transforms into two transitions, first-order spin flop followed by second order...
We study the mechanical response of bulk CrSBr in temperature using a string resonator. observe two abrupt changes eigenfrequency and quality factor resonator with decreasing temperature, strong one around 140 K due to an antiferromagnetic phase transition, weaker 200 possibly related change spin correlations. find that transition persists through window 30 rather than showing narrow sharp change, indicating gradual process. In addition, exhibits unexpected increase during which violates...
Van der Waals heterostructures of two-dimensional materials have opened up new frontiers in condensed matter physics, unlocking unexplored possibilities electronic and photonic device applications. However, the investigation wide-gap high-$κ$ layered dielectrics for devices based on van structures has been relatively limited. In this work, we demonstrate an easily reproducible synthesis method rare earth oxyhalide LaOBr, exfoliate it as a 2D material with measured static dielectric constant...
The layered, air-stable van der Waals antiferromagnetic compound CrSBr exhibits pronounced coupling between its optical, electronic, and magnetic properties. As an example, exciton dynamics can be significantly influenced by lattice vibrations through exciton-phonon coupling. Using low-temperature photoluminescence spectroscopy, we demonstrate the effective excitons phonons in nanometer-thick CrSBr. By careful analysis, identify that satellite peaks predominantly arise from interaction...
Antiferromagnets (AFMs) are promising platforms for the transmission of quantum information via magnons (the quanta spin waves), offering advantages over ferromagnets with regard to dissipation, speed response, and immunity external fields. Recently, it was shown that in insulating van der Waals (vdW) semiconductor, CrSBr, strong spin-exciton coupling enables readout magnon density propagation using photons visible light. This exciting observation came a puzzle: photogenerated were observed...
Magnetic van der Waals (vdW) materials offer a fantastic platform to investigate and exploit rich spin configurations stabilized in reduced dimensions. One tantalizing magnetic order is the interlayer antiferromagnetism A-type vdW antiferromagnet, which may be effectively modified by field, stacking thickness scaling. However, atomically revealing orientation antiferromagnet highly challenging, because most of material candidates exhibit an insulating ground state or instability ambient...