A5083618991- Quantum and electron transport phenomena
- Graphene research and applications
- Magnetic properties of thin films
- Topological Materials and Phenomena
- Neuroscience and Neural Engineering
- Diamond and Carbon-based Materials Research
- Covalent Organic Framework Applications
- Molecular Junctions and Nanostructures
- Force Microscopy Techniques and Applications
- Photoreceptor and optogenetics research
- Advanced Materials and Mechanics
- Engineering and Material Science Research
- Atomic and Subatomic Physics Research
- Advanced Memory and Neural Computing
- Microfluidic and Bio-sensing Technologies
- Electronic and Structural Properties of Oxides
- Physics of Superconductivity and Magnetism
- Magnetic Field Sensors Techniques
- Surface Chemistry and Catalysis
- Metal-Organic Frameworks: Synthesis and Applications
- Magnetism in coordination complexes
- Space Satellite Systems and Control
- Advanced Physical and Chemical Molecular Interactions
- Space Exploration and Technology
- Advanced Materials Characterization Techniques
Harvard University
2021
University of California, Berkeley
2016-2021
École Polytechnique Fédérale de Lausanne
2018-2019
University of Zurich
2018-2019
Council of Ministers of Education
1991
York University
1991
Abstract Fractional Chern insulators (FCIs) are lattice analogues of fractional quantum Hall states that may provide a new avenue towards manipulating non-Abelian excitations. Early theoretical studies 1–7 have predicted their existence in systems with flat bands and highlighted the critical role particular geometry. However, FCI been observed only Bernal-stacked bilayer graphene (BLG) aligned hexagonal boron nitride (hBN) 8 , which very large magnetic field is responsible for bands,...
Covalent organic frameworks (COFs) are molecule-based 2D and 3D materials that possess a wide range of mechanical electronic properties. We have performed joint experimental theoretical study the structure boroxine-linked COFs grown under ultrahigh vacuum conditions characterized using scanning tunneling spectroscopy on Au(111) hBN/Cu(111) substrates. Our results show single hBN layer electronically decouples COF from metallic substrate, thus suppressing substrate-induced broadening...
The three essential pillars of magnetic data storage devices are readability, writeability, and stability. However, these requirements compete as domain sizes reach the fundamental limit single atoms molecules. proven bistability individual holmium on magnesium oxide appeared to operate within this trilemma, sacrificing writeability for unprecedented Using stray field created by tip a spin-polarized scanning tunneling microscope (SP-STM), we controllably move Ho state into quantum regime,...
Abstract Symmetry-broken electronic phases support neutral collective excitations. For example, monolayer graphene in the quantum Hall regime hosts a nearly ideal ferromagnetic phase at specific filling factors that spontaneously breaks spin-rotation symmetry 1–3 . This ferromagnet has been shown to spin-wave excitations known as magnons can be electrically generated and detected 4,5 Although long-distance magnon propagation demonstrated via transport measurements, important thermodynamic...
Electron spin resonance with a scanning tunneling microscope (ESR-STM) combines the high energy resolution of spectroscopy atomic scale control and spatial STM. Here we describe upgrade helium-3 STM 2D vector-field magnet ($B_z$ = 8.0 T, $B_x$ 0.8 T) to an ESR-STM. The system is capable delivering RF power tunnel junction at frequencies up 30 GHz. We demonstrate magnetic field sweep ESR for model TiH/MgO/Ag(100) find moment $(1.004 \pm 0.001)$ $\mu_B$. Our enables toggle between DC mode,...
Abstract The use of electric fields for signalling and control in liquids is widespread, spanning bioelectric activity cells to electrical manipulation microstructures lab-on-a-chip devices. However, an appropriate tool resolve the spatio-temporal distribution over a large dynamic range has yet be developed. Here we present label-free method image local real time under ambient conditions. Our technique combines unique gate-variable optical transitions graphene with critically coupled planar...
The measurement of electrical activity across systems excitable cells underlies current progress in neuroscience, cardiac pharmacology, and neurotechnology. However, bioelectricity spans orders magnitude intensity, space, time, posing substantial technological challenges. development methods permitting network-scale recordings with high spatial resolution remains key to studies electrogenic cells, emergent networks, bioelectric computation. Here, we demonstrate single-shot label-free imaging...
Spin-polarized scanning tunneling microscopy (SP-STM) measures magnetoresistance with atomic resolution. While various methods for achieving SP probes have been developed, each is limited respect to fabrication, performance, and operating conditions. In this study, we present the fabrication use of SP-STM tips made from commercially available antiferromagnetic Mn88Ni12 foils. The are intrinsically SP, which attractive exploring magnetic phenomena in zero field limit. tip material relatively...