A5049990075- 2D Materials and Applications
- Topological Materials and Phenomena
- Graphene research and applications
- Quantum and electron transport phenomena
- Strong Light-Matter Interactions
- Quantum Chromodynamics and Particle Interactions
- Heusler alloys: electronic and magnetic properties
- High-Energy Particle Collisions Research
- Iron-based superconductors research
- Thermal properties of materials
- Rare-earth and actinide compounds
- MXene and MAX Phase Materials
- Nuclear physics research studies
- Inorganic Chemistry and Materials
- Chalcogenide Semiconductor Thin Films
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- High-pressure geophysics and materials
- Cold Atom Physics and Bose-Einstein Condensates
- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Physics of Superconductivity and Magnetism
- Nanowire Synthesis and Applications
- Photosynthetic Processes and Mechanisms
- Quantum Information and Cryptography
The University of Texas at Dallas
2020-2025
van der Waals (vdW) magnets are receiving ever-growing attention nowadays due to their significance in both fundamental research on low-dimensional magnetism and potential applications spintronic devices. The high crystalline quality of vdW is the key maintaining intrinsic magnetic electronic properties, especially when exfoliated down two-dimensional limit. Here, ultrahigh-quality air-stable CrSBr crystals synthesized using direct solid-vapor synthesis method. single crystallinity spatial...
Experiments provide clear signs of a weak topological insulator (TI) state, in which select surfaces conduct while the interior insulates, as well hints higher-order TI where conduction is confined to hinges.
The increasing complexity of semiconductor devices fabricated from wide-bandgap and ultra-wide-bandgap materials demand advanced thermal management solutions to mitigate heat buildup, a major cause device failure. High conductivity are thus becoming crucial for management. Cubic boron arsenide (c-BAs) has emerged as promising candidate. However, challenges remain in synthesizing high-quality crystals with low defect concentrations, high homogeneous conductivity, yields using the conventional...
A monoclinic variant of the ThCr2Si2-type structure BaAg2Sb2, with Pearson symbol mC10, has been discovered. Its crystal was determined by single-crystal X-ray diffraction, space group C2/m (No. 12), and lattice parameters a = 12.441(4) Å, b 4.790(2) c 4.876(2) β 112.88(1)°, V 268.8(6) Å3. It features tetragonally coordinated Ag2Sb2 layers that are distorted stacked along crystallographic a-axis, strong interlayer Sb-Sb bond. Transport measurements reveal non-negligible magnetoresistivity up...
We report a combined experimental and theoretical study of the ${\mathrm{PdSe}}_{2\ensuremath{-}x}{\mathrm{Te}}_{x}$ system. With increasing Te fraction, structural evolutions, first from an orthorhombic phase (space group Pbca) to monoclinic $C2/c)$ then trigonal $P\text{\ensuremath{-}}3m1)$, are observed accompanied with clearly distinct electrical transport behavior. The new $(C2/c)$ belongs very rare Verbeekite polymorphism is discovered within narrow range composition...
Bi4I4 belongs to a novel family of quasi-one-dimensional (1D) topological insulators (TIs). While its β phase was demonstrated be prototypical weak TI, the α phase, long thought trivial insulator, recently predicted rare higher order TI. Here, we report first gate tunable transport together with evidence for unconventional band topology in exfoliated α-Bi4I4 field effect transistors. We observe Dirac-like longitudinal resistance peak and sign change Hall resistance; their temperature...
Anisotropy is a fundamental property of both material and photonic systems. The interplay between anisotropies, however, has hardly been explored due to the vastly different length scales. Here we demonstrate exciton polaritons in 2D antiferromagnet, CrSBr, coupled with an anisotropic crystal cavity, where spin, atomic, anisotropies are strongly correlated. Atomic anisotropy led exceptionally strong coupling optical modes, which stable against excitation densities few orders magnitude higher...
We report the synthesis and physical properties studies of quasi-one-dimensional (quais-1D) iron chalcogenide ${\mathrm{BaFe}}_{2}{\mathrm{Se}}_{4}$ which shares ${\mathrm{FeSe}}_{4}$ tetrahedra building motif commonly seen in superconductors. A high-quality polycrystalline sample was achieved by solid-state reaction method characterized x-ray diffraction, electrical resistivity, magnetic susceptibility, neutron diffraction measurements. is a narrow gap semiconductor that magnetically orders...
We report the design and observation of an ideal weak topological insulator in a quasi-one-dimensional bismuth halide, ${\mathrm{Bi}}_{4}{\mathrm{I}}_{1.2}{\mathrm{Br}}_{2.8}$. Via angle-resolved photoemission spectroscopy, we identify that ${\mathrm{Bi}}_{4}{\mathrm{I}}_{1.2}{\mathrm{Br}}_{2.8}$ hosts surface states on ${(100)}^{\ensuremath{'}}$ side form two anisotropic $\ensuremath{\pi}$-offset Dirac cones while topologically dark (001) top surface. The results fully determine unique...
The growth of single crystal cubic boron arsenide (c-BAs) has attracted considerable interest due to its high room-temperature thermal conductivity and ambipolar electrical mobility. However, currently the only technique reported for c-BAs crystals is chemical vapor transport (CVT) method, which exhibits several drawbacks with regard size scalability quality control, thereby hindering further advancement this semiconductor material. Herein, we report a flux using liquid arsenic (l-As) as...
Topologically protected edge channels show prospects for quantum devices. They have been found experimentally in two-dimensional spin Hall insulators (QSHIs), weak topological insulators, and higher-order but the number of materials realizing these topologies is still quite limited. Here, we provide evidence states within a novel topology named three-dimensional QSHIs. Its originates solely from nonzero <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
Anisotropy plays a key role in science and engineering. However, the interplay between material engineered photonic anisotropies has hardly been explored due to vastly different length scales. Here we demonstrate matter-light hybrid system, exciton-polaritons 2D antiferromagnet, CrSBr, coupled with an anisotropic crystal (PC) cavity, where spin, atomic lattice, lattices are strongly correlated, giving rise unusual properties of system new possibilities tuning. We show exceptionally strong...
Two-dimensional transition metal dichalcogenide PdTe$_2$ recently attracts much attention due to its phase coexistence of type-II Dirac semimetal and type-I superconductivity. Here we report a 67 % enhancement superconducting temperature in the 1T-PdSeTe comparison that PdTe2 through partial substitution Te atoms by Se. The superconductivity has been unambiguously confirmed magnetization, resistivity specific heat measurements. shows with large anisotropy non-bulk nature volume fraction ~ 20...
The mass modifications of the bottomonium states ($\Upsilon (NS)$,$N=1,2,3,4$ and $\Upsilon (1D)$) in magnetized nuclear matter are studied using chiral effective model. in-medium masses calculated from medium modification scalar dilaton field model, which simulates gluon condensates QCD. strengths wave functions (assumed to be harmonic oscillator functions) denoted by parameter, $\beta$, (NS)$, $N=1,2,3,4$, fitted their observed decay widths $e^+e^-$. width for channel, (1D) \rightarrow e^+...
van der Waals (vdW) magnets are receiving ever-growing attention nowadays due to their significance in both fundamental research on low-dimensional magnetism and potential applications spintronic devices. High crystalline quality of vdW is key for maintaining intrinsic magnetic electronic properties, especially when exfoliated down the 2D limit. Here, ultrahigh-quality air-stable CrSBr crystals synthesized using direct vapor-solid synthesis method. The high single crystallinity spatial...
The paradigm of classifying three-dimensional (3D) topological insulators into strong and weak ones (STI WTI) opens the door for discovery various phases matter protected by different symmetries defined in dimensions. However, contrast to vast realization STIs, very few materials have been experimentally identified as being close WTI. Even amongst those identified, none exists with surface states (TSS) exposed a global bulk band gap that is stable at all temperatures. Here we report design...
Electronic topological phases are renowned for their unique properties, where conducting surface states exist on the boundary of an insulating three-dimensional bulk. While transport response has been extensively studied, hinge modes remains elusive. Here, we investigate a layered insulator $\alpha$-Bi$_4$Br$_4$, and provide first evidence quantum in gapless existing within bulk energy gaps. Our magnetoresistance measurements reveal pronounced h/e periodic (where h denotes Planck's constant...