Spin-orbit effects in GaAs quantum wells: Interplay between Rashba, Dresselhaus, and Zeeman interactions

The interplay between Rashba, Dresselhaus, and Zeeman interactions in a quantum well submitted to an external magnetic field is studied by means of an accurate analytical solution of the Hamiltonian, including electron-electron interactions in a sum-rule approach. This solution allows us to discuss the influence of the spin-orbit coupling on some relevant quantities that have been measured in inelastic light scattering and electron-spin resonance experiments on quantum wells. In particular, we have evaluated the spin-orbit contribution to the spin splitting of the Landau levels and to the splitting of charge- and spin-density excitations. We also discuss how the spin-orbit effects change if the applied magnetic field is tilted with respect to the direction perpendicular to the quantum well.

Spin-orbit effects in GaAs quantum wells: Interplay between Rashba, Dresselhaus, and Zeeman interactions

The interplay between Rashba, Dresselhaus, and Zeeman interactions in a quantum well submitted to an external magnetic field is studied by means of an accurate analytical solution of the Hamiltonian, including electron-electron interactions in a sum-rule approach. This solution allows us to discuss the influence of the spin-orbit coupling on some relevant quantities that have been measured in inelastic light scattering and electron-spin resonance experiments on quantum wells. In particular, we have evaluated the spin-orbit contribution to the spin splitting of the Landau levels and to the splitting of charge- and spin-density excitations. We also discuss how the spin-orbit effects change if the applied magnetic field is tilted with respect to the direction perpendicular to the quantum well.

Estudio de caso DMT y síndrome autista: aportes para una intervención desde una terapia por el arte.

El tema de la tesina es ¿DMT y Síndrome Autista: aportes para una intervención desde una terapia por el arte¿. El trabajo se centra en un estudio de caso de una joven con retraso mental severo, con diagnóstico de TGD o autismo de alto funcionamiento. La presentación está organizada en tres partes, en la primera expongo el tema de la tesina, describo sus objetivos y el marco teórico referencial: explicación del diagnóstico, fenómenos transicionales, autoterapia del niño autista, DMT y autismo, juego y creatividad. En la segunda parte, llevo a cabo la reseña del estudio de caso: desarrollo de sesiones, proceso cronológico de las mismas y proceso personal. La tercera parte está destinada a las conclusiones y reflexiones personales.