Results 71 to 80 of about 1,496 (181)
Physical Review B, 2017 A family of topological semimetallic phases where twofold degenerate gapless points form linked rings is introduced. We refer to this phase as Weyl-link semimetals. A concrete two-band model with two linked nodal lines is constructed. We demonstrate that the Chern-Simons 3-form depends on the linking number of rings in a generic two-band model.
Chang, Po-Yao, Yee, Chuck-Hou
openaire +3 more sources
Hydrodynamic modes of holographic Weyl semimetals
Physics Letters BWe study the quasinormal modes of a holographic model of a Weyl semimetal. The model features quantum phase transition between a topological phase and a trivial phase. We put particular emphasis on the hydrodynamic modes and show that a hydrodynamic mode
Nishal Rai, Karl Landsteiner
doaj +1 more source
Near‐Infrared Polarimetric Imaging With Nonlinear Flat‐Optics
Laser &Photonics Reviews, Volume 20, Issue 18, 18 September 2026.ABSTRACT A compact and broadband polarimetric imaging platform is presented, based on second‐harmonic generation (SHG) in nonlinear flat‐optics. The system employs periodic all‐dielectric AlGaAs gratings to induce polarization‐dependent SH emission, enabling pixel by pixel direct retrieval of the full Stokes vector from an input intensity distribution ...
Evgenii Menshikov +6 more
wiley +1 more source
Intrinsic coupling between spatially-separated surface Fermi-arcs in Weyl orbit quantum Hall states
Nature Communications, 2021 The spatial distribution of the quantized transport due to the presence of Weyl orbits in topological semimetals remains elusive. Here, the authors report concomitant modulation of doubly-degenerate quantum Hall states, evidencing intrinsic coupling ...
Shinichi Nishihaya +5 more
doaj +1 more source
Laser &Photonics Reviews, Volume 20, Issue 18, 18 September 2026.A phase‐change magneto‐optical metagrating combines GST switching with InAs guided‐mode resonances to achieve strong nonreciprocal absorption contrast near normal incidence. A static magnetic bias creates direction‐dependent resonant splitting, while GST crystallization quenches and latches the response.
Ye Ming Qing +5 more
wiley +1 more source
Quantum multicriticality in disordered Weyl semimetals [PDF]
Physical Review B, 2018 In electronic band structure of solid state material, two band touching points with linear dispersion appear in pair in the momentum space. When they annihilate with each other, the system undergoes a quantum phase transition from three-dimensional Weyl semimetal (WSM) phase to a band insulator phase such as Chern band insulator (CI) phase.
Luo, Xunlong +3 more
openaire +2 more sources
Advanced Quantum Technologies, Volume 9, Issue 9, September 2026.Nonlinear photocurrents provide broadband spectroscopic access to quantum materials from terahertz to optical frequencies. Their sensitivity to spin, orbital, chiral, topological, and quantum‐geometric properties enables insights across ferroelectrics, magnetic and two‐dimensional materials, moiré heterostructures, topological flat bands, and light ...
Kurosch Mehrgan +2 more
wiley +1 more source
Broadband and Enhanced Second‐Harmonic Generation in Metallic 3R‐TaS2
Small, Volume 22, Issue 53, 21 September 2026.A pronounced and robust SHG response has been observed in metallic 3R‐TaS2. It shows broadband SH conversion from 1020 nm to 1410 nm. Moreover, compared to the sapphire substrate, 3R‐TaS2 flakes with various thicknesses on the gold substrate showed different SHG enhancement; the enhancement factors range from 2.7 to 45.5.
Ruo‐Si Chen +9 more
wiley +1 more source
Evidence for topological type-II Weyl semimetal WTe2
Nature Communications, 2017 Exotic transport properties of type-II Weyl semimetals have been predicted but are yet to be experimentally evidenced. Here, Li et al. report evidences of an anisotropy of negative magnetoresistance and a quantum oscillation arising from the predicted ...
Peng Li +9 more
doaj +1 more source
Gate‐Tunable Floquet Weyl Photon Emission from Topological Dirac Semimetal Cd3As2
Advanced Materials, Volume 38, Issue 47, 21 August 2026.We report experimental demonstration of Floquet band engineering in a 3D Dirac semimetal. Circularly polarized light breaks the time reversal symmetry and transforms Cd3As2 into a Floquet–Weyl phase, splitting Dirac nodes into chirality‐opposite Weyl nodes with nonzero Berry curvature.
Sobhan Subhra Mishra +4 more
wiley +1 more source