47 citations · 377 across the 26 of their papers we have counts for
26 papers
Superconductivity in Nb: from the impact of temperature, Cooper-pairing to dimensionality
Uriel A. Aceves Rodriguez, Filipe Guimarães, Samir Lounis
The ability to simulate realistically the electronic structure of superconducting materials is important to understand and predict various properties emerging in both the supercond…
Ultrafast light-induced magnetization in non-magnetic films: from orbital and spin Hall phenomena to the inverse Faraday effect
Hanan Hamamera, Filipe Souza Mendes Guimarães, Manuel dos Santos Dias +1
The field of orbitronics has emerged with great potential to impact information technology by enabling environmentally friendly electronic devices. The main electronic degree of fr…
Magnetic exchange interactions at the proximity of a superconductor
Uriel Allan Aceves Rodríguez, Filipe Souza Mendes Guimarães, Sascha Brinker +1
Interfacing magnetism with superconductivity gives rise to a wonderful playground for intertwining key degrees of freedom: Cooper pairs, spin, charge, and spin-orbit interaction, f…
Spin excitation of Co atoms at monatomic Cu chains
Neda Noei, Roberto Mozara, Ana M. Montero +7
The zero-bias anomaly in conductance spectra of single Co atoms on Cu(111) observed at 4 K, which has been interpreted as being due to a Kondo resonance, is strongly modi…
Orbital magnetoelectric effect in nanoribbons of transition metal dichalcogenides
Tarik P. Cysne, Filipe S. M. Guimarães, Luis M. Canonico +3
The orbital magnetoelectric effect (OME) generically refers to the appearance of an orbital magnetization induced by an applied electric field. Here, we show that nanoribbons of tr…
Polarisation-dependent single-pulse ultrafast optical switching of an elementary ferromagnet
Hanan Hamamera, Filipe Souza Mendes Guimarães, Manuel dos Santos Dias +1
The ultimate control of magnetic states of matter at femtosecond (or even faster) timescales defines one of the most pursued paradigm shifts for future information technology. In t…
Correlating Josephson supercurrents and Shiba states in quantum spins unconventionally coupled to superconductors
Felix Küster, Ana M. Montero, Filipe S. M. Guimarares +4
Local spins coupled to superconductors give rise to several emerging phenomena directly linked to the competition between Cooper pair formation and magnetic exchange. These effects…
Orbital magnetoelectric effect in zigzag nanoribbons of p-band systems
Tarik P. Cysne, Filipe S. M. Guimarães, Luis M. Canonico +2
Profiles of the spin and orbital angular momentum accumulations induced by a longitudinally applied electric field are explored in nanoribbons of -band systems with a honeycomb…
Multiple magnetic states of CoPc molecule on a two-dimensional layer of NbSe
Ana M. Montero, Filipe S. M. Guimarães, Samir Lounis
Molecular spintronics hinges on the detailed understanding of electronic and magnetic properties of molecules interfaced with various materials. Here we demonstrate with ab-initio…
Trends in the hyperfine interactions of magnetic adatoms on thin insulating layers
Sufyan Shehada, Manuel dos Santos Dias, Filipe Souza Mendes Guimarães +2
Nuclear spins are among the potential candidates prospected for quantum information technology. A recent breakthrough enabled to atomically resolve their interaction with the elect…
Zero-point quantum swing of magnetic couples
Juba Bouaziz, Julen Ibañez-Azpiroz, Filipe S. M. Guimarães +1
Quantum fluctuations are ubiquitous in physics. Ranging from conventional examples like the harmonic oscillator to intricate theories on the origin of the universe, they alter virt…
Spontaneous and externally driven quantum spin fluctuations of 3d and 4d single atoms adsorbed on graphene
Siham Sadki, Filipe Souza Mendes Guimarães, Juba Bouaziz +3
At the heart of current information nanotechnology lies the search for ideal platforms hosting the smallest possible magnets, i.e. single atoms with magnetic moments pointing out-o…
Spin-orbit torques and their associated effective fields from gigahertz to terahertz
Filipe S. M. Guimarães, Juba Bouaziz, Manuel dos Santos Dias +1
Terahertz spintronics offers the prospect of devices which are both faster and more energy-efficient. A promising route to achieve this goal is to exploit current-induced spin-orbi…
Spin dynamics of and impurities embedded in prototypical topological insulators
Juba Bouaziz, Manuel dos Santos Dias, Filipe Souza Mendes Guimarães +1
Topological insulators are insulating bulk materials hosting conducting surface states. Their magnetic doping breaks time-reversal symmetry and generates numerous interesting effec…
Comparative study of methodologies to compute the intrinsic Gilbert damping: interrelations, validity and physical consequences
Filipe S. M. Guimarães, J. R. Suckert, Jonathan Chico +3
Relaxation effects are of primary importance in the description of magnetic excitations, leading to a myriad of methods addressing the phenomenological damping parameters. In this…
Impurity-induced orbital magnetization in a Rashba electron gas
Juba Bouaziz, Manuel dos Santos Dias, Filipe Souza Mendes Guimarães +2
We investigate the induced orbital magnetization density in a Rashba electron gas with magnetic impurities. Relying on classical electrodynamics, we obtain this quantity through th…
Spin-resolved inelastic electron scattering by spin waves in noncollinear magnets
Flaviano José dos Santos, Manuel dos Santos Dias, Filipe Souza Mendes Guimarães +2
Topological non-collinear magnetic phases of matter are at the heart of many proposals for future information nanotechnology, with novel device concepts based on ultra-thin films a…
Engineering elliptical spin-excitations by complex anisotropy fields in Fe adatoms and dimers on Cu(111)
Filipe S. M. Guimarães, Manuel dos Santos Dias, Benedikt Schweflinghaus +1
We investigate the dynamics of Fe adatoms and dimers deposited on the Cu(111) metallic surface in the presence of spin-orbit coupling, within time-dependent density functional theo…
Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
Filipe S. M. Guimarães, Manuel dos Santos Dias, Juba Bouaziz +3
Spin-orbit-related effects offer a highly promising route for reading and writing information in magnetic units of future devices. These phenomena rely not only on the static magne…
Dynamic RKKY interaction between magnetic moments in graphene nanoribbons
F. S. M. Guimarães, J. Duffy, A. T. Costa +2
Graphene has been identified as a promising material with numerous applications, particularly in spintronics. In this paper we investigate the peculiar features of spin excitations…
Dynamical current-induced ferromagnetic and antiferromagnetic resonances
F. S. M. Guimarães, S. Lounis, A. T. Costa +1
We demonstrate that ferromagnetic and antiferromagnetic excitations can be triggered by the dynamical spin accumulations induced by the bulk and surface contributions of the spin H…
Spin Currents in Metallic Nanostructures; Explicit Calculations
F. S. M. Guimarães, A. T. Costa, R. B. Muniz +1
In ultrathin ferromagnets deposited on metallic substrates, excitation of precessional motion of the spins produces a spin current in the substrate that transports angular momentum…
Dynamic RKKY interaction in graphene
S. R. Power, F. S. M. Guimaraes, A. T. Costa +2
The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the RKKY interaction in graphene, based on which the energetically favoura…
Graphene as a non-magnetic spin-current lens
F. S. M. Guimarães, A. T. Costa, R. B. Muniz +1
In spintronics, the ability to transport magnetic information often depends on the existence of a spin current traveling between two different magnetic objects acting as source and…