A5074721554- 2D Materials and Applications
- Topological Materials and Phenomena
- Advanced Condensed Matter Physics
- Perovskite Materials and Applications
- Graphene research and applications
- Optical Polarization and Ellipsometry
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Atomic and Subatomic Physics Research
- Spectroscopy and Laser Applications
- Molecular Junctions and Nanostructures
- Energy Harvesting in Wireless Networks
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Astro and Planetary Science
- Advanced Memory and Neural Computing
- Planetary Science and Exploration
- Spectroscopy and Quantum Chemical Studies
- Diamond and Carbon-based Materials Research
- Quantum and electron transport phenomena
- Mechanical and Optical Resonators
- Cold Atom Physics and Bose-Einstein Condensates
- Solid-state spectroscopy and crystallography
- Historical Economic and Social Studies
- Space Science and Extraterrestrial Life
Harvard University
2021-2024
California Institute of Technology
2020-2021
Quantum geometry in condensed-matter physics has two components: the real part quantum metric and imaginary Berry curvature. Whereas effects of curvature have been observed through phenomena such as Hall effect two-dimensional electron gases anomalous (AHE) ferromagnets, rarely explored. Here, we report a nonlinear induced by dipole interfacing even-layered MnBi 2 Te 4 with black phosphorus. The switches direction upon reversing antiferromagnetic (AFM) spins exhibits distinct scaling that is...
The twist degree of freedom provides a powerful new tool for engineering the electrical and optical properties van der Waals heterostructures. Here, we show that angle can be used to control spin-valley transition metal dichalcogenide bilayers by changing momentum alignment valleys in two layers. Specifically, observe interlayer excitons twisted WSe$_2$/WSe$_2$ exhibit high (>60%) circular polarization (DOCP) long valley lifetimes (>40 ns) at zero electric magnetic fields. lifetime tuned...
Diode effects are of great interest for both fundamental physics and modern technologies. Electrical diode (nonreciprocal transport) have been observed in Weyl systems. Optical arising from the fermions theoretically considered but not probed experimentally. Here, we report observation a nonlinear optical effect (NODE) magnetic semimetal CeAlSi, where magnetization introduces pronounced directionality second-harmonic generation (SHG). We demonstrate six-fold change measured SHG intensity...
The intrinsically superconducting Dirac semimetal <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mn>2</a:mn><a:mi>M</a:mi><a:mtext>−</a:mtext><a:msub><a:mi>WS</a:mi><a:mn>2</a:mn></a:msub></a:mrow></a:math> is a promising candidate for realizing proximity-induced topological superconductivity in its protected surface states. A precise characterization of the bulk state essential to understand nature system. Here, we report detailed experimental study temperature-dependent...
Electronic ferroelectricity represents a new paradigm where spontaneous symmetry breaking driven by electronic correlations, in contrast to traditional lattice-driven ferroelectricity, leads the formation of electric dipoles. Despite potential application advantages arising from its nature, switchable remains exceedingly rare. Here, we report discovery an ratchet effect that manifests itself as layer-contrasting graphene-boron nitride moir\'e heterostructure. Our engineered layer-asymmetric...
In a PN junction, the separation between positive and negative charges leads to diode transport. past few years, intrinsic transport in noncentrosymmetric polar conductors has attracted great interest, because it suggests novel nonlinear applications provides symmetry-sensitive probe of Fermi surface. Recently, such studies have been extended superconductors, realizing superconducting effect. Here, we show that, even centrosymmetric crystal without directional charge separation, spins an...
Quantum geometry - the of electron Bloch wavefunctions is central to modern condensed matter physics. Due quantum nature, has two parts, real part metric and imaginary Berry curvature. The studies curvature have led countless breakthroughs, ranging from Hall effect in 2DEGs anomalous (AHE) ferromagnets. However, contrast curvature, rarely been explored. Here, we report a new nonlinear induced by interfacing even-layered MnBi2Te4 (a PT-symmetric antiferromagnet (AFM)) with black phosphorus....
The intrinsically superconducting Dirac semimetal 2M-WS$_{2}$ is a promising candidate to realize proximity-induced topological superconductivity in its protected surface states. A precise characterization of the bulk state essential for understanding nature system. Here, we perform detailed experimental study temperature and nonmagnetic disorder dependence London penetration depth $λ$, upper critical field $H_{c2}$, transition $T_c$ 2M-WS$_{2}$. We observe power-law $λ(T) - λ(0) \propto...
Diode effects are of great interest for both fundamental physics and modern technologies. Electrical diode (nonreciprocal transport) have been observed in Weyl systems. Optical arising from the fermions theoretically considered but not probed experimentally. Here, we report observation a nonlinear optical effect (NODE) magnetic semimetal CeAlSi, where magnetization introduces pronounced directionality second-harmonic generation (SHG). We show demonstrate six-fold change measured SHG...