A5075876729- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Graphene research and applications
- Advanced Thermoelectric Materials and Devices
- Semiconductor materials and interfaces
- Topological Materials and Phenomena
- Quantum and electron transport phenomena
- Copper-based nanomaterials and applications
- Molecular Junctions and Nanostructures
- Catalytic Processes in Materials Science
- ZnO doping and properties
- Electronic and Structural Properties of Oxides
- Perovskite Materials and Applications
- Magnetic properties of thin films
- Microgrid Control and Optimization
- Frequency Control in Power Systems
- Smart Grid Energy Management
- Assistive Technology in Communication and Mobility
- Multilevel Inverters and Converters
- BIM and Construction Integration
- Copper Interconnects and Reliability
- Advanced DC-DC Converters
- Life Cycle Costing Analysis
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
University of Ulsan
2017-2024
Vietnam National University Ho Chi Minh City
2023-2024
Ho Chi Minh City University of Science
2023-2024
National Institute on Deafness and Other Communication Disorders
2021
Emergent phenomena driven by electronic reconstructions in oxide heterostructures have been intensively discussed. However, the role of these shaping properties van der Waals heterointerfaces has hitherto not established. By reducing material thickness and forming a heterointerface, we find two types charge-ordering transitions monolayer VSe2 on graphene substrates. Angle-resolved photoemission spectroscopy (ARPES) uncovers that Fermi-surface nesting becomes perfect ML VSe2....
SnSe single crystals have recently been found to exhibit excellent thermoelectric performance with an extremely high figure of merit (ZT) value 2.6. Although this ZT has attracted considerable attention, the microscopic origin p-type characteristics is not yet clearly understood. Here, we directly observed and identified intrinsic point defects existing on via scanning tunneling microscopy (STM) investigated effect electronic properties using density functional theory (DFT) calculations. Our...
Abstract Microscopic structures and magnetic properties are investigated for Fe 5− x GeTe 2 single crystal, recently discovered as a promising van der Waals (vdW) ferromagnet. An atom (Fe(1)) located in the outermost 5 Ge sublayer has two possible split‐sites which either above or below atom. Scanning tunneling microscopy shows √3 × superstructures attributed to ordering of Fe(1) layer. The have different phases due symmetry ordering. Intriguingly, observed breaks inversion resulting...
Accurate atomistic models for metal/oxide interfaces play a pivotal role in determining copper-based interfacial processes, ranging from electronic circuitry wirings to chemical catalysis. The “29” and “44” surfaces represent two of the most classical embryonic oxides on Cu(111). Although many attempts have been made offer detailed these surface oxides, their atomic structures remain elusive. Here, we address this open question via ab initio STM simulations, where functionalized-metal tips...
A combined study of scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES) is conducted to understand the multiple charge density wave (CDW) phases monolayer (ML) VSe2 films manifested by graphene substrates. Submonolayer (∼0.8 ML) are prepared on two different substrates single-layer (SLG) bi-layer (BLG) a 6H-SiC(0001). We find that ML less coupled SLG substrate compared VSe2/BLG. Then, grown BLG reveals very topography in STM. While VSe2/BLG shows one...
The alloying behavior of crystalline SnSe<sub>1−x</sub>S<sub>x</sub> was investigated at the atomic level by combining STM experiments and DFT calculations.
Bilayer VSe<sub>2</sub> shows polymorphic 1T′ structure which can transit to the dynamic state of lattice vibrations, triggered by tunneling current.
NiTe2, a type-II Dirac semimetal with strongly tilted band, has been explored extensively to understand its intriguing topological properties. Here, using density-functional theory (DFT) calculations, we report that the strength of spin-orbit coupling (SOC) in NiTe2 can be tuned by Se substitution. This results negative shifts bulk point (BDP) while preserving band. Indeed, combined studies scanning tunneling spectroscopy (STS) and angle-resolved photoemission (ARPES) confirm BDP NiTe2-xSex...
Cu2O has been investigated for decades to understand the complex nature of oxidation and utilize its high catalytic activity intrinsic p-type character. However, structures defects Cu2O(111) surfaces have not fully explored at atomistic level, which is required clarify some issues such as termination surfaces. Here, our combined scanning tunneling microscopy (STM) density functional theory (DFT) studies show that a stoichiometric surface where coordinately unsaturated Cu atoms appear with...
Understanding the characteristics of intrinsic defects in crystals is great interest many fields, from fundamental physics to applied materials science. Combined investigations scanning tunneling microscopy/spectroscopy (STM/S) and density functional theory (DFT) are conducted understand nature Se vacancy monolayer (ML) ReSe2 grown on a graphene substrate. Among four possible sites, we identify Se4 close Re layer by registry between STM topography DFT simulated images. The also...
Vanadium ditelluride (VTe2) has been intensively explored to understand the charge density wave (CDW) phase and its connection magnetic properties. Here, we conduct a systematic study fine structure of CDW via scanning tunneling microscopy (STM) combined with functional theory (DFT) calculations. STM topograph at 79 K shows that in VTe2 stripe modulation 3 × 1 periodicity, following double zigzag chain distorted Te lattices. Interestingly, undergoes contrast inversion between filled empty...
In this study, the effect of elastic biaxial strain on electronic structure and anomalous Hall conductivity (AHC) α‐Fe has been systematically studied by using combination a first principles calculation with tight binding method through Wannier function. It is found that applying in cubic results reduction crystal symmetry gives modification bands near Fermi level, which causes significant change AHC strained systems. The to be sensitive strain, shows large enhancement at +2% tensile value...
and purpose: Speech entrainment therapy (SET) is a computerized therapeutic approach that involves mimicking an audiovisual speech model to improve production. In pilot study using SET for treatment of post-stroke non-fluent aphasia, significant gains were achieved in verbs per minute (VPM) during discourse untrained items 1 6 weeks after treatment, suggesting may yield meaningful improvements fluent spontaneous individuals with aphasia.The Entrainment Aphasia Recovery (SpARc) trial...