A5085340863- Graphene research and applications
- 2D Materials and Applications
- Topological Materials and Phenomena
- Boron and Carbon Nanomaterials Research
- MXene and MAX Phase Materials
- Photonic Crystals and Applications
- Food Quality and Safety Studies
- Catalytic Processes in Materials Science
- Textile materials and evaluations
- Vibration and Dynamic Analysis
- Food composition and properties
- Graphene and Nanomaterials Applications
- Conducting polymers and applications
- Quantum and electron transport phenomena
- Inorganic Chemistry and Materials
- Transition Metal Oxide Nanomaterials
- Synthesis and properties of polymers
- Electrospun Nanofibers in Biomedical Applications
- Biodiesel Production and Applications
- Carbon Nanotubes in Composites
- GABA and Rice Research
- Plasmonic and Surface Plasmon Research
- Urban Heat Island Mitigation
- Thermal Radiation and Cooling Technologies
- Mechanical and Optical Resonators
University of Seoul
2016-2025
We survey the electronic structure and magnetic properties of two-dimensional (2D) $M\mathrm{P}{X}_{3}$ ($M=\text{V},\text{Cr},\text{Mn},\text{Fe},\text{Co},\text{Ni},\text{Cu},\text{Zn}$, $X=\text{S},\text{Se},\text{Te}$) transition-metal chalcogenophosphates to shed light on their potential role as single-layer van der Waals materials that possess order. Our ab initio calculations predict most these are antiferromagnetic semiconductors. The band gaps states decrease atomic number chalcogen...
Superlattices from twisted graphene mono- and bilayer systems give rise to on-demand many-body states such as Mott insulators unconventional superconductors. These phenomena are ascribed a combination of flat bands strong Coulomb interactions. However, comprehensive understanding is lacking because the low-energy band structure strongly changes when an electric field applied vary electron filling. Here, we gain direct access filling-dependent (TBG) double (TDBG) by applying microfocused...
We present a density functional theory study of the carrier-density and strain dependence magnetic order in two-dimensional (2D) MAX$_3$ (M= V, Cr, Mn, Fe, Co, Ni; A= Si, Ge, Sn, X= S, Se, Te) transition metal trichalcogenides. Our {\em ab initio} calculations show that this class compounds includes wide narrow gap semiconductors metals half-metals, most these are magnetic. Although antiferromagnetic is common, ferromagnetism predicted MSiSe$_3$ for M= Ni, MSiTe$_3$ MnGeSe$_3$, MGeTe$_3$...
Abstract Recent experiments in magic-angle twisted bilayer graphene have revealed a wealth of novel electronic phases as result interaction-driven spin-valley flavour polarisation. In this work, we investigate correlated due to the combined effect spin-orbit coupling-enhanced valley polarisation and large density states below half filling moiré band coupled tungsten diselenide. We observe an anomalous Hall effect, accompanied by series Lifshitz transitions that are highly tunable with...
Near the magic angle, strong correlations drive many intriguing phases in twisted bilayer graphene (tBG) including unconventional superconductivity and chern insulation. Whether can tune symmetry breaking tBG at intermediate (≳ 2°) twist angles remains an open fundamental question. Here, using ARPES, we study effects of many-body interactions displacement field on band structure devices (3°) angle. We observe a layer- doping-dependent renormalization bands K points that is qualitatively...
Rhombohedral multilayer graphene (RnG) featuring partially flat bands has emerged as an important platform to probe strong Coulomb correlation effects. Theoretical consideration of local electron-electron interactions are particular importance for electronic eigenstates with a tendency spatially localize. We present method incorporate mean-field interaction corrections in the tight-binding hopping parameters band Hamiltonian within extended Hubbard model that incorporates ab initio estimates...
Local interlayer charge polarization of twisted bilayer hexagonal boron nitride (t2BN) is calculated and parametrized as a function twist angle perpendicular electric fields through tight-binding calculations on lattice relaxed geometries relaxations tend to increase the bandwidth nearly flat bands, where widths smaller than $\ensuremath{\sim}1$ meV are expected for $\ensuremath{\theta}\ensuremath{\le}1.{08}^{\ensuremath{\circ}}$ parallel BN/BN alignment,...
Superlattices from twisted graphene mono- and bi-layer systems give rise to on-demand quantum many-body states such as Mott insulators, unconventional superconductors the fractional Hall effect. These phenomena are observed in transport experiments when changing filling of low-energy electronic bands. Their origin is broadly ascribed a combination flat bands strong Coulomb interactions, yet comprehensive understanding lacking. This primarily because relevant band structure believed strongly...
Thread lifting is popular for addressing the loss of facial skin elasticity and reducing wrinkles.However, incidence complications varies with practitioner's competence, characteristics materials used, variations in procedural techniques.Therefore, this study aimed to compare outcomes thread procedures based on insertion layer suture length propose different techniques tailored objective lifting.We assessed major observed individuals who underwent evaluate overall efficacy safety...