Unconventional spin texture of a topologically nontrivial semimetal Sb(110)

9 p.

Edad de menarquía e indicadores de adiposidad en universitarias del País Vasco

La revista permite a los autores reutilizar su fichero para depositarlo en su web o repositorio institucional, sin ánimo de lucro y mencionando la fuente original.

Valoración de la composición corporal y de la percepción de la imagen en un grupo de mujeres universitarias del País Vasco

Este trabajo se encuentra bajo la licencia Creative Commons Attribution 3.0.

A dynamic CGE modelling approach for analyzing trade-offs in climate change policy options: the case of Green Climate Fund

38 p.

Spin-orbita elkarrekintza eta trukatze-korrelazio eremu eskalar eta bektorialaren ab-initio kalkuluak LAPW metodoaren bidez: Bismutoaren adibidea

Gradu amaierako lan honetan, LAPW metodoa aztertu da solidoen propietate elektronikoak era teorikoan ikertzeko eta efektu erlatibistek hauengan duten eragina zenbatesteko tresna teoriko bezala. Konkretuki spin-orbita elkarrekintzan zentratu gara, eta hau konputazionalki inplementatzeko bigarren bariazionalaren metodoa aztertu da. Bestalde, Spin-DFT teoriaren barruan spin-orbita kodifikatzen duen trukatze-korrelazio eremu bektorialaren azterketa labur bat egin da, ekarpen erlatibista beste ikuspuntu batetik aztertu eta informazio osagarria lortzeko asmoz.

Digital-Analog Quantum Simulation of Spin Systems in Trapped Ions

65 p.

Spin-related phenomena in magnetic and spin-orbit couppled bose-einstein condensates

129 p.

Spin-helical Dirac states in graphene induced by polar-substrate surfaces with giant spin-orbit interaction: a new platform for spintronics

Spintronics, or spin electronics, is aimed at efficient control and manipulation of spin degrees of freedom in electron systems. To comply with demands of nowaday spintronics, the studies of electron systems hosting giant spin-orbit-split electron states have become one of the most important problems providing us with a basis for desirable spintronics devices. In construction of such devices, it is also tempting to involve graphene, which has attracted great attention because of its unique and remarkable electronic properties and was recognized as a viable replacement for silicon in electronics. In this case, a challenging goal is to lift spin degeneracy of graphene Dirac states. Here, we propose a novel pathway to achieve this goal by means of coupling of graphene and polar-substrate surface states with giant Rashba-type spin-splitting. We theoretically demonstrate it by constructing the graphene@BiTeCl system, which appears to possess spin-helical graphene Dirac states caused by the strong interaction of Dirac and Rashba electrons. We anticipate that our findings will stimulate rapid growth in theoretical and experimental investigations of graphene Dirac states with real spin-momentum locking, which can revolutionize the graphene spintronics and become a reliable base for prospective spintronics applications.

Charge and spin transport in graphene devices

170 p.

Nonlinear magnetic vortex dynamics in a circular nanodot excited by spin-polarized current

We investigate analytically and numerically nonlinear vortex spin torque oscillator dynamics in a circular magnetic nanodot induced by a spin-polarized current perpendicular to the dot plane. We use a generalized nonlinear Thiele equation including spin-torque term by Slonczewski for describing the nanosize vortex core transient and steady orbit motions and analyze nonlinear contributions to all forces in this equation. Blue shift of the nano-oscillator frequency increasing the current is explained by a combination of the exchange, magnetostatic, and Zeeman energy contributions to the frequency nonlinear coefficient. Applicability and limitations of the standard nonlinear nano-oscillator model are discussed.

Spin squeezing, macrorealism and the heisenberg uncertainty principle

169 p.

Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons

Single-spin asymmetries were investigated in inclusive electroproduction of charged pions and kaons from transversely polarized protons at the HERMES experiment. The asymmetries were studied as a function of the azimuthal angle psi about the beam direction between the target-spin direction and the hadron production plane, the transverse hadron momentum P-T relative to the direction of the incident beam, and the Feynman variable x(F). The sin psi* amplitudes are positive for pi(+) and K+ slightly negative for pi(-) and consistent with zero for K-, with particular P-T but weak x(F) dependences. Especially large asymmetries are observed for two small subsamples of events, where also the scattered electron was recorded by the spectrometer. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.

von Neumann spin measurements with Rashba fields

We show that dynamics in the spin-orbit coupling field simulate the von Neumann measurement of a particle spin. We demonstrate how the measurement influences the spin and coordinate evolution of a particle by comparing two examples of such a procedure. The first example is a simultaneous measurement of spin components, sigma(x) and sigma(y), corresponding to non-commuting operators, which cannot be accurately obtained together at a given time instant due to the Heisenberg uncertainty ratio. By mapping spin dynamics onto a spatial walk, such a procedure determines measurement-time averages of sigma(x) and sigma(y), which can already be precisely evaluated in a single short-time measurement. The other, qualitatively different, example is the spin of a one-dimensional particle in a magnetic field. Here, the measurement outcome depends on the angle between the spin-orbit coupling and magnetic fields. These results can be applied to studies of spin-orbit coupled cold atoms and electrons in solids.

Spin orbitronics in metals

158 p.

Charge and spin transport in nanoscale devices

137 p.