A5103237020- Topological Materials and Phenomena
- Advanced Condensed Matter Physics
- Graphene research and applications
- Electronic and Structural Properties of Oxides
- Iron-based superconductors research
- Magnetic properties of thin films
- 2D Materials and Applications
- Molecular Junctions and Nanostructures
- Carbon Nanotubes in Composites
- Rare-earth and actinide compounds
- Characterization and Applications of Magnetic Nanoparticles
- Thermal properties of materials
- Theoretical and Computational Physics
- Graphene and Nanomaterials Applications
- Advanced Thermoelectric Materials and Devices
- Physics of Superconductivity and Magnetism
- MXene and MAX Phase Materials
- Quantum and electron transport phenomena
- Quantum-Dot Cellular Automata
- Quantum, superfluid, helium dynamics
- Semiconductor Quantum Structures and Devices
- Magnetic and transport properties of perovskites and related materials
Massachusetts Institute of Technology
2019-2024
Columbia University
2007-2014
We report infrared studies of the Landau level (LL) transitions in single layer graphene. Our specimens are density tunable and show situ half-integer quantum Hall plateaus. Infrared transmission is measured magnetic fields up to $B=18\text{ }\text{ }\mathrm{T}$ at selected LL fillings. Resonances between hole LLs electron LLs, as well resonances resolved. Their transition energies proportional $\sqrt{B}$, deduced band velocity...
Abstract The kagome lattice has long been regarded as a theoretical framework that connects geometry to unusual singularities in electronic structure. Transition metal compounds have recently identified promising material platform investigate the long-sought flat band. Here we report signature of two-dimensional band at surface antiferromagnetic FeSn by means planar tunneling spectroscopy. Employing Schottky heterointerface and an n-type semiconductor Nb-doped SrTiO 3 , observe anomalous...
The two-dimensional limit of layered materials has recently been realized through the use van der Waals (vdW) heterostructures composed weakly interacting layers. In this paper, we describe two different classes vdW heterostructures: inorganic prepared by co-lamination and restacking; organic-inorganic hetero-epitaxy created physical vapor deposition organic molecule crystals on an substrate. Both types exhibit atomically clean interfaces. Employing such heterostructures, have demonstrated...
The two-dimensional kagome lattice hosts Dirac fermions at its Brillouin zone corners $K$ and ${K}^{\ensuremath{'}}$, analogous to the honeycomb lattice. In density functional theory electronic structure of ferromagnetic metal ${\mathrm{Fe}}_{3}{\mathrm{Sn}}_{2}$, without spin-orbit coupling, we identify two energetically split helical nodal lines winding along $z$ in vicinity ${K}^{\ensuremath{'}}$ resulting from trigonal stacking layers. We find that hopping across A-A introduces a layer...
Abstract In this study, we employed molecular dynamics simulations to investigate the interfacial thermal conductance (ITC) and phonon transport of heterostructures composed graphene (GE) quasi-hexagonal phase fullerene (qHPC 60 ). We examined effects size, interface interaction coefficients, equilibrium time on ITC GE/qHPC heterostructure. The simulation results between GE qHPC under different interlayer coefficients show that an increase in strength leads a significant Also, required for...
FeSn is a room-temperature antiferromagnet expected to host Dirac fermions in its electronic structure. The interplay of the magnetic degree freedom and makes an attractive platform for spintronics devices. While stabilization thin film needed development such devices, there exist no previous reports epitaxial growth single crystalline FeSn. Here, we report realization films (001) grown by molecular beam epitaxy on crystal SrTiO3 (111) substrates. By combining X-ray diffraction, electrical...
This paper reports the first realization of epitaxial GdBi thin films by molecular beam epitaxy. By systematically studying electronic and magnetic properties with varying film thicknesses from 40 nm to 5 nm, authors found that semimetallicity is lifted below 9 while antiferromagnetic order maintained down minimum thickness. Combined method they have developed stabilize an ultra-thin against atmospheric degradation, this a step towards realizing novel Chern insulating state number 2 in...
${\mathrm{Ni}}_{3}\mathrm{In}$ is a paramagnetic intermetallic consisting of $AB$-stacked Ni-kagome networks. Correlated electron behaviors deviating from the Fermi-liquid form have recently been observed in bulk single crystals, attributed to stabilization partially flat electronic band near Fermi level. Synthesis this system thin-film offers unique opportunities for tuning materials that could aid identifying microscopic origin non-Fermi-liquid response and exploring suspected quantum...