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Magneto-optical response of the magnetic semiconductors EuCd2X2 (X =P, As, Sb)

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Spin polarization detection via chirality-induced tunnelling currents in indium selenide

Shun Feng, Andras Kis, Gabriele Pasquale, Eloi Régis L Collette

Chirality, a basic property of symmetry breaking, is crucial for fields such as biology and physics. Recent advances in the study of chiral systems have stimulated interest in the discovery of symmetry-breaking states that enable exotic phenomena such as s ...

Springer Science and Business Media LLC2025

Metal Doping of Strongly Confined Halide Perovskite Nanocrystals under Ambient Conditions

Emad Oveisi, Aurélien Bornet, Pascal Alexander Schouwink, Sascha Feldmann, Tejas Deshpande, Zachary Andrew Vanorman

Halide perovskite nanocrystals are promising materials for optoelectronic applications. Metal doping provides an avenue to boost their performance further, e.g., by enhancing light emission, or to provide additional functionalities, such as nanoscale magne ...

American Chemical Society (ACS)2025

Optical Spatial Dispersion Via Wannier Interpolation

Stepan Tsirkin

We present a numerical implementation, based on Wannier interpolation, of a Kubo-Greenwood formalism for computing the spatially dispersive optical conductivity in crystals at first order in the wave vector of light. This approach is more efficient than di ...

AMER PHYSICAL SOC2025

Study of Ionized Particles in a Gyrotron Using a Full Gyrotron Simulation Model

Jean-Philippe Hogge, Jérémy Genoud

The ionization of the residual gas in gyrotrons causes the generation of positively charged ions and negatively charged electrons. Using the electron optics code Ariadne, it was possible to simulate the behavior of these electrons in the overall gyrotron g ...

Institute of Electrical and Electronics Engineers Inc.2024

Quantum Spin Dynamics Due to Strong Kitaev Interactions in the Triangular-Lattice Antiferromagnet CsCeSe2

Andreas Martin Läuchli Herzig

The extraordinary properties of the Kitaev model have motivated an intense search for new physics in materials that combine geometrical and bond frustration. In this Letter, we employ inelastic neutron scattering, spin wave theory, and exact diagonalizatio ...

American Physical Society (APS)2024

Magnetism of Single Surface Adsorbed Atoms Studied with Radio-Frequency STM

Clément Marie Soulard

This thesis investigates the magnetic properties of single atoms and molecules adsorbed on thin magnesium oxide decoupling layers, grown on a silver single crystal. To address these systems experimentally, we use a low temperature scanning tunneling micros ...

EPFL2024

Magnetic structure of a single-crystal thin film of EuCd2Sb2

Henrik Moodysson Rønnow, Jian Rui Soh

We investigate the magnetic order in single crystalline EuCd2Sb2 thin films using a combined theoretical and experimental approach. Resonant elastic x-ray scattering experiments reveal a sharp magnetic peak at q=(0,0,12) below TN=7.2 K, indicative of inter ...

2024

Type-I antiferromagnetic Weyl semimetal InMnTi2

Nicola Marzari, Luca Binci, Davide Grassano

Topological materials have been a main focus of studies in the past decade due to their protected properties that can be exploited for the fabrication of new devices. Among them, Weyl semimetals are a class of topological semimetals with nontrivial linear ...

Amer Physical Soc2024

Magnetic fields do not suppress global star formation in low metallicity dwarf galaxies

Robin Gopala Tress

Many studies concluded that magnetic fields suppress star formation in molecular clouds and Milky Way like galaxies. Ho we ver, most of these studies are based on fully developed fields that have reached the saturation level, with little work on investigat ...

OXFORD UNIV PRESS2023

A machine-learning-based tool for last closed-flux surface reconstruction on tokamaks

Olivier Sauter, Alessandro Pau

Tokamaks allow to confine fusion plasma with magnetic fields. The prediction/reconstruction of the last closed-flux surface (LCFS) is one of the primary challenges in the control of the magnetic configuration. The evolution in time of the LCFS is determine ...

IOP Publishing Ltd2023

KCo2As2: A new portal for the physics of high-purity metals

Lin Yang

High-quality single crystals of KCo2As2 with the body-centered tetragonal ThCr2Si2 structure were grown using KAs self flux. Structural, magnetic, thermal, and electrical transport properties were investigated. No clear evidence for any phase transitions w ...

2022

Directional ballistic transport in the two-dimensional metal PdCoO2

Matthias Carsten Putzke

In an idealized infinite crystal, the material properties are constrained by the symmetries of the unit cell. The point-group symmetry is broken by the sample shape of any finite crystal, but this is commonly unobservable in macroscopic metals. To sense th ...

NATURE PORTFOLIO2022

Production of a Chiral Magnetic Anomaly with Emerging Turbulence and Mean-Field Dynamo Action

Salim Bennouna

In relativistic magnetized plasmas, asymmetry in the number densities of left-and right-handed fermions, i.e., a nonzero chiral chemical potential mu(5), leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a u ...

AMER PHYSICAL SOC2022

Magnetic force microscopy contrast formation and field sensitivity

Marcos Penedo Garcia, Johannes Schwenk

The magnetic force microscope (MFM) is an established experimental tool for imaging stray fields with high spatial resolution and sensitivity. The MFM contrast can however contain contributions from the sample topography, variations in the surface Kelvin p ...

2022

Three-dimensional inhomogeneity of electron-temperature-gradient turbulence in the edge of tokamak plasmas

Justin Richard Ball

Nonlinear multiscale gyrokinetic simulations of a Joint European Torus edge pedestal are used to show that electron-temperature-gradient (ETG) turbulence has a rich three-dimensional structure, varying strongly according to the local magnetic-field configu ...

IOP Publishing Ltd2022

Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3

Oleg Yazyev, Christopher Marc Mudry, Daniel Gosalbez Martinez

Charge neutrality and their expected itinerant nature makes excitons potential transmitters of information. However, exciton mobility remains inaccessible to traditional optical experiments that only create and detect excitons with negligible momentum. Her ...

2022

Account of the baryonic feedback effect in gamma-ray measurements of intergalactic magnetic fields

Kyrylo Bondarenko

Aims. Intergalactic magnetic fields in the voids of the large-scale structure can be probed via measurements of secondary gamma-ray emission from gamma-ray interactions with extragalactic background light. Lower bounds on the magnetic field in the voids we ...

2022

Design of multi-stimuli responsive hybrid pneumatic-magnetic soft actuator with novel channel integration

Yi Sun

Smart polymeric materials based soft actuators are flexible, lightweight, and can deliver a wide range of actu-ations. Thus, they are ideal for applications requiring delicate and unconventional motions, such as biomedical and soft robotics. This paper rep ...

2022

Pivotal Role of Intersite Hubbard Interactions in Fe-Doped alpha-MnO2

Iurii Timrov

We present a first-principles investigation of the structural, electronic, and magnetic properties of the pristine and Fe-doped alpha-MnO2 using density-functional theory with extended Hubbard functionals. The onsite U and intersite V Hubbard parameters ar ...

AMER CHEMICAL SOC2022

Modified BiFeO3/rGO nanocomposite by controlled synthesis to enhance adsorption and visible-light photocatalytic activity

Mohammadreza Golobostanfard

In this study, a sol-gel process is used to synthesize a bismuth ferrite (BiFeO3, or BFO for short)/ reduced graphene oxide (rGO) nanocomposite (BGO). The structural, morphological, and op-tical characteristics of the BiFeO3 nanopowder are modified by cont ...

2022