Results 61 to 70 of about 142,691 (284)

Infrared Nanocrystals for Space Application: Hardness to Irradiations

open access: yesAdvanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret   +22 more
wiley   +1 more source

R3c-type LnNiO3 (Ln = La, Ce, Nd, Pm, Gd, Tb, Dy, Ho, Er, Lu) half-metals with multiple Dirac cones: a potential class of advanced spintronic materials

open access: yesIUCrJ, 2019
In the past three years, Dirac half-metals (DHMs) have attracted considerable attention and become a high-profile topic in spintronics becuase of their excellent physical properties such as 100% spin polarization and massless Dirac fermions.
Xiaotian Wang   +7 more
doaj   +1 more source

Symplectic Dirac operators and $${Mp^{\rm c}}$$ -structures [PDF]

open access: yesGeneral Relativity and Gravitation, 2011
Given a symplectic manifold $(M, )$ admitting a metaplectic structure, and choosing a positive $ $-compatible almost complex structure $J$ and a linear connection $\nabla$ preserving $ $ and $J$, Katharina and Lutz Habermann have constructed two Dirac operators $D$ and ${\wt{D}}$ acting on sections of a bundle of symplectic spinors.
Cahen, Michel   +2 more
openaire   +5 more sources

Imaging of Biphoton States: Fundamentals and Applications

open access: yesAdvanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Theory of Dirac Electrons in Organic Conductors

open access: yesCrystals, 2012
The dynamical property of electrons with the tilted Dirac cone was examined using the tilted Weyl equation. The polarization function exhibits cusps and nonmonotonic structures by varying both the frequency and the momentum.
Akito Kobayashi, Yoshikazu Suzumura
doaj   +1 more source

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

open access: yesAdvanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit   +5 more
wiley   +1 more source

Topological thermoelectrics

open access: yesAPL Materials, 2020
Since the first-generation three-dimensional topological insulators were discovered in classic thermoelectric systems, the exploration of novel topological materials for advanced thermoelectric energy conversion has attracted increasing attention.
Chenguang Fu, Yan Sun, Claudia Felser
doaj   +1 more source

SuperTracer: a calculator of functional supertraces for one-loop EFT matching

open access: yesJournal of High Energy Physics, 2021
We present SuperTracer, a Mathematica package aimed at facilitating the functional matching procedure for generic UV models. This package automates the most tedious parts of one-loop functional matching computations.
Javier Fuentes-Martín   +4 more
doaj   +1 more source

Optically-Induced Symmetry Switching in a Reconfigurable Kagome Photonic Lattice: From Flatband to Type-III Dirac Cones

open access: yesNanomaterials, 2022
We demonstrate the transition of band structure from flatband to type-III Dirac cones in an electromagnetically induced Kagome photonic lattice generated in a three-level Λ-type 85Rb atomic configuration both experimentally and theoretically.
Qingsong Yu   +5 more
doaj   +1 more source

The Coexistence of van Hove Singularities and Superlattice Dirac Points in a Slightly Twisted Graphene Bilayer

open access: yes, 2013
We consider the electronic structure of a slightly twisted graphene bilayer and show the coexistence of van Hove singularities (VHSs) and superlattice Dirac points in a continuum approximation.
Chu, Zhao-Dong, He, Lin, He, Wen-Yu
core   +1 more source

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