A5029312746- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Topological Materials and Phenomena
- Rare-earth and actinide compounds
- 2D Materials and Applications
- Iron-based superconductors research
- Graphene research and applications
- Quantum and electron transport phenomena
- Crystal Structures and Properties
- Advanced Thermoelectric Materials and Devices
- Advanced Condensed Matter Physics
- Inorganic Chemistry and Materials
- Magnetic and transport properties of perovskites and related materials
- Chalcogenide Semiconductor Thin Films
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Interactive and Immersive Displays
- Medical and Agricultural Research Studies
- Air Traffic Management and Optimization
- Heusler alloys: electronic and magnetic properties
- Quantum, superfluid, helium dynamics
- Child Therapy and Development
- Infant Health and Development
- Hand Gesture Recognition Systems
- Human Pose and Action Recognition
Princeton University
2021-2024
Arizona State University
2024
Florida Atlantic University
2022
Czech Technical University in Prague
2022
Northwestern University
2018-2020
The Ohio State University
2016
Three doubly ordered double perovskites NaREMgWO6 (RE = La, Gd, Y) have been synthesized via traditional solid-state methods, doped with Eu3+, and characterized to evaluate their promise as Eu3+ phosphor hosts. NaYMgWO6, a new member of the family, was found crystallize in P21 space group is isostructural NaGdMgWO6. Emissions characteristic ions (5D0 → 7F4,3,2,1,0) were observed, most intense transition being 5D0 7F2 near 615 nm. Substitution onto more compressed RE site NaY1-xEuxMgWO6...
Liquid-phase chemical exfoliation can achieve industry-scale production of two-dimensional (2D) materials for a wide range applications. However, many 2D with potential applications in quantum technologies often fail to leave the laboratory setting because their air sensitivity and depreciation physical performance after processing. We report simple method create stable, aqueous, surfactant-free, superconducting ink containing phase-pure 1T'-WS2 monolayers that are isostructural...
Defect chemistry is critical to designing high performance thermoelectric materials. In SnTe, the naturally large density of cation vacancies results in excessive hole doping and frustrates ability control properties. Yet, recent work also associates with suppressed sound velocities low lattice thermal conductivity, underscoring need understand interplay between alloying, vacancies, transport properties SnTe. Here, we report solid solutions SnTe NaSbTe2 NaBiTe2 (NaSnmSbTem+2 NaSnmBiTem+2,...
The link between crystal and electronic structure is crucial for understanding structure-property relations in solid-state chemistry. In particular, it has been instrumental topological materials, where electrons behave differently than they would conventional solids. Herein, we identify 1D Bi chains as a structural motif of interest materials. We focus on Sm3ZrBi5, new quasi-one-dimensional (1D) compound the Ln3MPn5 (Ln = lanthanide; M metal; Pn pnictide) family that crystallizes P63/mcm...
Magnetic topological semimetals present open questions regarding the interplay of crystal symmetry, magnetism, band topology, and electron correlations. Ln${\mathrm{Sb}}_{x}{\mathrm{Te}}_{2\text{\ensuremath{-}}x\text{\ensuremath{-}}\ensuremath{\delta}}$ (Ln denotes Lanthanide) is a family square-net-derived that allows compositional control filling, access to different states via an evolving charge density wave (CDW) distortion. Previously studied Gd Ce members containing CDW have shown...
Dirac and Weyl semimetals host exotic quasiparticles with unconventional transport properties, such as high magnetoresistance carrier mobility. Recent years have witnessed a huge number of newly predicted topological from existing databases; however, experimental verification often lags behind predictions. Common reasons are synthetic difficulties or the stability phases. Here, we report synthesis type-II semimetal Ir2In8S, an air-stable compound new structure type. This material has two...
Cation deintercalation with soft-chemical methods provides a route to synthesize new layered compounds emergent physical and chemical properties that are inaccessible by conventional high-temperature solid-state synthesis methods. One example is CrSe2, van der Waals (vdW) material promising as an air-stable two-dimensional (2D) magnet. has rarely been studied mechanistically, optimized reaction pathways yield high-quality materials often poorly understood. In this work, we perform detailed...
While several magnetic topological semimetals have been discovered in recent years, their band structures are far from ideal, often obscured by trivial bands at the Fermi energy. Square-net materials with clean, linearly dispersing show potential to circumvent this issue. CeSbTe, a square-net material, features multiple field-controllable phases. Here, it is shown that even higher degrees of tunability can be achieved changing electron count motif. Increased filling results structural...
2M-WS2 is a metastable, superconducting polymorph of the transition metal dichalcogenide (TMD) WS2, comprised layers face-sharing distorted WS6 octahedra. It predicted to host non-Abelian quantum states, promising for topological computing. Due its thermodynamic instability, cannot be synthesized using solid-state synthesis. Rather, it requires top-down approach in which K+ deintercalated from KxWS2; so far, this process has been completed strong oxidizer, K2Cr2O7 dilute H2SO4. A...
1D charge transport offers great insight into strongly correlated physics, such as Luttinger liquids, electronic instabilities, and superconductivity. Although is observed in nanomaterials quantum wires, examples bulk crystalline solids remain elusive. In this work, it demonstrated that spin-orbit coupling (SOC) can act a mechanism to induce quasi-1D the Ln
The field of mineralogy represents an area untapped potential for the synthetic chemist, as there are numerous structure types that can be utilized to form analogues mineral structures with useful optoelectronic properties. In this work, we describe synthesis and characterization two novel quaternary sulfides A1+xSn2-xBi5+xS10 (A = Li+, Na+). Though not natural minerals themselves, both compounds adopt pavonite structure, which crystallizes in C2/m space group consists connected, alternating...
Subchalcogenides are uncommon compounds where the metal atoms in unusually low formal oxidation states. They bridge gap between intermetallics and semiconductors can have unexpected structures properties because of exotic nature their chemical bonding as they contain both metal–metal metal–main group (e.g., halide, chalcogenide) interactions. Finding new members this class materials presents synthetic challenges attempts to make them often result phase separation into binary compounds. We...
As the country of Lebanon sinks deeper into economic turmoil and healthcare devastation, period poverty has been recorded to reach its all-time high, whereby it was estimated that 66% adolescent Lebanese girls cannot afford menstrual products manage their cycle. The following descriptive paper aims discuss overall situation in Lebanon, particularly during crisis hit coincided with start COVID-19 pandemic. It will then highlight nongovernmental organization initiatives community-based...
Carrier multiplication (CM), where the absorption of a single photon results in generation several electron-hole pairs via impact ionization, plays pivotal role quest for enhancing performance solar cells beyond Shockley-Queisser limit. The combination its narrow bandgap relative to energy visible light, along with low phonon frequencies that hinder efficient dissipation into phonons, makes topological insulator Bi$_2$Se$_3$ an optimal candidate material CM. Here we use time- and...
Automatic markerless estimation of infant posture and motion from ordinary videos carries great potential for movement studies "in the wild", facilitating understanding motor development massively increasing chances early diagnosis disorders. There is rapid human pose methods in computer vision thanks to advances deep learning machine learning. However, these are trained on datasets featuring adults different contexts. This work tests compares seven popular (AlphaPose, DeepLabCut/DeeperCut,...
Subchalcogenides are uncommon, and their chemical bonding results from an interplay between metal–metal metal–chalcogenide interactions.
Abstract We report five new isostructural compounds in the Ln 3 MBi 5 (Ln=Pr, Nd, Sm; M=Zr, Hf) family, and compare them to recently reported Sm ZrBi analogue. crystallizes P 6 / mcm space group, hosting anti ‐Hf Sn Cu structure type. The one‐dimensional consists of hypervalent Bi 2− chains face‐sharing octahedra that form along c axis. A framework 3+ cations charge balances separates two motifs. Bi−Bi M−Bi bond lengths decrease as cation becomes smaller across period, but there is almost no...
Optical spectroscopy of quantum materials at ultralow temperatures is rarely explored, yet it may provide critical characterizations phases not possible using other approaches. We describe the development a novel experimental platform that enables optical spectroscopic studies, together with standard electronic transport, millikelvin inside dilution refrigerator. The instrument capable measuring both bulk crystals and micrometer-sized two-dimensional van der Waals devices. demonstrate its...
Magnetic topological semimetals present open questions regarding the interplay of crystal symmetry, magnetism, band topology, and electron correlations. $LnSb_{x}Te_{2-x-\delta}$ (Ln= lanthanide) is a family square-net-derived that allows compositional control filling, access to different states via an evolving charge density wave (CDW) distortion. Previously studied Gd Ce members containing CDW have shown complex magnetic phase diagrams, which implied spins localized on Ln interact with...
Flat bands that do not merely arise from weak interactions can produce exotic physical properties, such as superconductivity or correlated many-body effects. The quantum metric differentiate whether flat will result in physics are dangling bonds. A potential avenue for achieving involves leveraging geometrical constraints within specific lattice structures, the kagome lattice; however, materials often more complex. In these cases, geometry becomes a powerful indicator of nature with small...
Optical spectroscopy of quantum materials at ultralow temperatures is rarely explored, yet it may provide critical characterizations phases not possible using other approaches. We describe the development a novel experimental platform that enables optical spectroscopic studies, together with standard electronic transport, millikelvin inside dilution refrigerator. The instrument capable measuring both bulk crystals and micron-sized two-dimensional van der Waals devices. demonstrate...