15 citations · 45 across the 15 of their papers we have counts for
15 papers
Combining Frozen Trajectory Excitation and TACAW for in silico Time-Resolved Vibrational Electron Energy Loss/Gain Spectroscopy
Wojciech Marciniak, Joanna Marciniak, José Ángel Castellanos-Reyes +1
Seeing that ultrafast (picosecond timescale) vibrational electron energy loss spectroscopy (EELS) should soon be experimentally realizable, we present in silico approach capable of…
Atomic-Scale Observation of Symmetry Breaking in Altermagnetic MnTe
Guodong Ren, Jonathan M. DeStefano, Xiao-Wei Zhang +20
The recent discovery of altermagnetism has sparked growing interest in compensated magnetic systems as promising platforms for highly scalable spintronics. Altermagnetism is a dist…
Electrodynamics of swift-electron momentum transfer to a large spherical nanoparticle
Jesús Castrejón-Figueroa, Jorge Luis Briseño-Gómez, Eduardo Enrique Viveros-Armas +2
Swift electrons from highly focused beams produced in aberration-corrected scanning transmission electron microscopes offer a powerful route for probing and manipulating matter at…
Theory of Momentum-Resolved Electron Energy-Loss Spectra of Coupled Phonon and Magnon Excitations
José Ángel Castellanos-Reyes, Ivan P. Miranda, Paul M. Zeiger +2
We develop a theory of momentum-resolved electron energy-loss spectra in the scanning transmission microscope (STEM-EELS) that captures the effects of coupled phonon and magnon exc…
Giant magnetocrystalline anisotropy energy in Fe--Co alloy under uniaxial compression: first-principles prediction
Wojciech Marciniak, Joanna Marciniak, José Ángel Castellanos-Reyes +1
Uniaxially strained Fe--Co disordered alloys have emerged as promising candidates for cost-effective rare-earth-free permanent magnets due to their high magnetocrystalline anisotro…
Determination of Magnetic Symmetries by Convergent Beam Electron Diffraction
O. Zaiets, C. Timm, J. Rusz +3
Convergent-beam electron diffraction (CBED) is a well-established probe for spatial symmetries of crystalline samples, mainly exploiting the well-defined mapping between the diffra…
Magnon spectroscopy in the electron microscope
Demie Kepaptsoglou, José Ángel Castellanos-Reyes, Adam Kerrigan +9
The miniaturisation of transistors is approaching its limits due to challenges in heat management and information transfer speed. To overcome these obstacles, emerging technologies…
Mode-Dependent Phonon Relaxation in fcc Ni: Insights from Molecular Dynamics Simulations with Frozen-Trajectory Excitations
Wojciech Marciniak, Joanna Marciniak, José Ángel Castellanos-Reyes +1
We present a computational method and apply it to study phonon relaxation in face-centered cubic (fcc) nickel (Ni). The phonons are excited beyond their thermal equilibrium populat…
Angular momentum transfer from swift electrons to non-spherical nanoparticles within the dipolar approximation
Jorge Luis Briseño-Gómez, Atzin López-Tercero, José Ángel Castellanos-Reyes +1
In this work, we study the angular momentum transfer from a single swift electron to non-spherical metallic nanoparticles, specifically investigating spheroidal and polyhedral (Pla…
Dynamical theory of angle-resolved electron energy loss and gain spectroscopies of phonons and magnons in transmission electron microscopy including multiple scattering effects
José Ángel Castellanos-Reyes, Paul Zeiger, Ján Rusz
We present a method for computing angle-resolved electron-energy-loss and gain spectroscopies for phonon and magnon excitations in transmission electron microscopy. Fractional scat…
Unveiling the impact of temperature on magnon diffuse scattering detection in the transmission electron microscope
José Ángel Castellanos-Reyes, Paul Zeiger, Anders Bergman +4
Magnon diffuse scattering (MDS) signals could be studied with high spatial resolution in scanning transmission electron microscopy (STEM), thanks to recent technological progress i…
Theory and simulations of the angular momentum transfer from swift electrons to spherical nanoparticles in STEM
José Ángel Castellanos-Reyes, Jesús Castrejón-Figueroa, Alejandro Reyes-Coronado
Electron beams in scanning transmission electron microscopy (STEM) exert forces and torques on study samples, with magnitudes that allow the controlled manipulation of nanoparticle…
Simulations of magnetic Bragg scattering in transmission electron microscopy
Justyn Snarski-Adamski, Alexander Edström, Paul Zeiger +4
We have simulated the magnetic Bragg scattering in transmission electron microscopy in two antiferromagnetic compounds, NiO and LaMnAsO. This weak magnetic phenomenon was experimen…
Effects of a non-causal electromagnetic response on the linear momentum transfer from a swift electron to a metallic nanoparticle
J. Castrejón-Figueroa, J. Á. Castellanos-Reyes, A. Reyes-Coronado
Electron beams in Scanning Transmission Electron Microscopes (STEMs) can be used as a tool to induce movement on nanoparticles. Employing a classical-electrodynamics approach, it h…
Time-dependent forces between a swift electron and a small nanoparticle within the dipole approximation
J. Castrejón-Figueroa, J. Á. Castellanos-Reyes, C. Maciel-Escudero +2
In this paper we calculate the time-dependent forces between a swift electron traveling at constant velocity and a metallic nanoparticle made of either aluminum or gold. We conside…