Search results for "Electron dynamic"

showing 3 items of 3 documents

Electric voltage generation by antiferromagnetic dynamics

2015

We theoretically demonstrate dc and ac electric voltage generation due to spinmotive forces originating from domain wall motion and magnetic resonance, respectively, in two-sublattice antiferromagnets. Our theory accounts for the canting between the sublattice magnetizations, the nonadiabatic electron spin dynamics, and the Rashba spin-orbit coupling, with the inter-sublattice electron dynamics treated as a perturbation. This work suggests a new way to observe and explore the dynamics of antiferromagnetic textures by electrical means, an important aspect in the emerging field of antiferromagnetic spintronics, where both manipulation and detection of antiferromagnets are needed.

PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsSpintronicsFOS: Physical sciencesPerturbation (astronomy)02 engineering and technologyElectron dynamics021001 nanoscience & nanotechnology01 natural sciencesCondensed Matter::Materials ScienceMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesAntiferromagnetismCondensed Matter::Strongly Correlated Electrons010306 general physics0210 nano-technologySpin (physics)VoltagePhysical Review B
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Elucidating the electron transport in semiconductors via Monte Carlo simulations: An inquiry-driven learning path for engineering undergraduates

2015

Within the context of higher education for science or engineering undergraduates, we present an inquiry-driven learning path aimed at developing a more meaningful conceptual understanding of the electron dynamics in semiconductors in the presence of applied electric fields. The electron transport in a nondegenerate n-type indium phosphide bulk semiconductor is modelled using a multivalley Monte Carlo approach. The main characteristics of the electron dynamics are explored under different values of the driving electric field, lattice temperature and impurity density. Simulation results are presented by following a question-driven path of exploration, starting from the validation of the model…

Physicsbusiness.industryLearning environmentSettore FIS/08 - Didattica E Storia Della FisicaMonte Carlo methodinquiry-based learningPhysics::Physics EducationGeneral Physics and AstronomyContext (language use)Electron dynamicsEngineering physicsIII-V semiconductorTheoretical physicschemistry.chemical_compoundPhysics and Astronomy (all)SemiconductorchemistryPath (graph theory)Indium phosphideInquiry-based learningbusinessMonte Carlo simulation
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Defects in quantum ring to control high-harmonic spectrum

2017

AbstractThe high-harmonic generation from a structured quantum ring (SQR) driven by an intense laser field is presented within the single active electron approximation. The spectrum is studied by varying the symmetry of the physical system. The standard SQR (six identical and equidistant dots in a ring) presents a 60° rotational symmetry, that in this work is broken, moving or changing only one potential hole. We find that careful designed breaking of the geometrical symmetry of the SQR opens the possibility of controlling the characteristics of the harmonic lines such as intensity and polarization. HHG analysis of the emission spectrum performed through a Morlet wavelet, shows that the hig…

Time-resolved spectroscopyPhysicsAtomic and Molecular Physics and OpticIntense laserCondensed Matter Physic02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsRing (chemistry)01 natural sciencesSettore FIS/03 - Fisica Della MateriaAtomic and Molecular Physics and OpticsElectron dynamicHarmonic spectrum0103 physical sciencesHigh-harmonic generationElectrical and Electronic EngineeringAtomic physics010306 general physics0210 nano-technologyQuantum ringQuantumLaser and Particle Beams
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