A5085083198- 2D Materials and Applications
- MXene and MAX Phase Materials
- Graphene research and applications
- Ferroelectric and Piezoelectric Materials
- Perovskite Materials and Applications
- Advanced Thermoelectric Materials and Devices
- Carbon Nanotubes in Composites
- Global trade and economics
- Boron and Carbon Nanomaterials Research
- Solid-state spectroscopy and crystallography
- Electronic and Structural Properties of Oxides
- Scheduling and Optimization Algorithms
- Topological Materials and Phenomena
- Fullerene Chemistry and Applications
Virginia Tech
2018-2024
The University of Texas at Austin
2024
Phase transformation in emerging two-dimensional (2D) materials is crucial for understanding and controlling the interplay between structure electronic properties. In this work, we investigate 2D In2Se3 synthesized via chemical vapor deposition, a recently discovered ferroelectric material. We observed that layers with thickness ranging from single layer to ∼20 stabilized at β phase superstructure room temperature. At around 180 K, converted more stable β' was distinct previously reported...
Abstract Domain boundaries have been intensively investigated in bulk ferroelectric materials and two-dimensional materials. Many methods such as electrical, mechanical optical approaches utilized to probe manipulate domain boundaries. So far most research focuses on the initial final states of before after manipulation, while microscopic understanding evolution remains elusive. In this paper, we report controllable manipulation 2 Se 3 with atomic precision using scanning tunneling...
Tailoring the properties of two-dimensional (2D) crystals is important for both understanding material behavior and exploring new functionality. Here we demonstrate alteration MoS2 metal-MoS2 interfaces using a convergent ion beam. Different beam energies, from 60 eV to 600 eV, are shown have distinct effects on optical electrical MoS2. Defects deformations created across different layers were investigated, revealing an unanticipated improvement in Raman peak intensity multilayer when...
We report the first experimental characterization of isomerically pure and pristine C120 fullertubes, [5,5] C120-D5d(1) [10,0] C120-D5h(10766). These new molecules represent highest aspect ratio fullertubes isolated to date; for example, prior largest empty cage fullertube was C100-D5d(1). This increase 20 carbon atoms represents a gigantic leap in comparison three decades C60–C90 fullerene research. Moreover, C120-D5d(10766) has an end-cap derived from C80-Ih is whose C40 not yet been...
Van der Waals (vdW) heterostructures synthesized through the chemical vapor deposition (CVD) method allow creation and tuning of intriguing electronic optical properties two- dimensional (2D) materials, knowledge which is critical for a wide range potential applications. Here we report our scanning tunneling microscopy/spectroscopy (STM/STS) study as-grown MoS2 monolayer WS2/MoS2 heterobilayer on SiO2. The appears smoother than monolayer, with root mean square (RMS) roughness 0.230 +- 0.021...
Domain boundaries in ferroelectric materials exhibit rich and diverse physical properties distinct from their parent have been proposed for broad applications nanoelectronics quantum information technology. Due to complexity diversity, the internal atomic electronic structure of domain that governs remains far being elucidated. By using scanning tunneling microscopy spectroscopy (STM/S) combined with density functional theory (DFT) calculations, we directly visualize polar two-dimensional...
<title>Abstract</title> Transition metal dichalcogenide (TMD) twisted homobilayers have been established as an ideal platform for studying strong correlation phenomena, exemplified by the recent discovery of fractional Chern insulator (FCI) states in MoTe<sub>2</sub><sup>1–4</sup> and insulators (CI)<sup>5</sup> unconventional superconductivity<sup>6,7</sup> WSe<sub>2</sub> (tWSe<sub>2</sub>). In these systems, nontrivial topology strongly layer-hybridized regime can arise from a spatial...