Browsing by Author "Pitarke, Jose Maria"
Now showing items 21-34 of 34
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Optoelectronic properties in heterostructures of 2-dimensional materials
Morquillas Azpiazu, María Nieves (2018-07-20)Esta tesis presenta un estudio detallado de las propiedades optoelectrónicas de materiales confinados en 2 dimensiones. Principalmente se estudian materiales de la familia de los dicalcogenuros de metales de transicion ... -
Position-dependent exact-exchange energy for slabs and semi-infinite jellium
Horowitz, Claudio M.; Constantin, Lucian A.; Proetto, C. R.; Pitarke de la Torre, José María (American Physical Society, 2009-12)The position-dependent exact-exchange energy per particle epsilon(x)(z) (defined as the interaction between a given electron at z and its exact-exchange hole) at metal surfaces is investigated, by using either jellium slabs ... -
Role of occupied d bands in the dynamics of excited electrons and holes in Ag
García Lekue, Aran; Pitarke de la Torre, José María ; Tchoulkov Savkin, Evgueni Vladimirovich; Liebsch, A.; Echenique Landiribar, Pedro Miguel (American Physical Society, 2003)The role that occupied d bands play in the inelastic lifetime of bulk and surface states in Ag is investigated from the knowledge of the quasiparticle self-energy. In the case of bulk electrons, sp bands are taken to be ... -
Role of occupied d states in the relaxation of hot electrons in Au
Campillo Santos, Igor; Pitarke de la Torre, José María ; Rubio, A.; Echenique Landiribar, Pedro Miguel (American Physical Society, 2000-07-15)We present first-principles calculations of electron-electron scattering rates of low-energy electrons in Au. Our full band-structure calculations indicate that a major contribution from occupied d states participating in ... -
Spin transport in magnetic insulator/heavy metal heterostructures.
Gómez Pérez, Juan Manuel (2020-03-11)La espintrónica busca aprovechar además de la carga, el espín del electrón, para generar, transportar y manipular la información de espín, con el objetivo de solucionar problemas de la tecnología actual. Actualmente hay ... -
Spin-to-charge current conversion in systems with spin-orbit coupling
Sagasta Urrutia, Edurne (2019-07-09)This thesis is based on the experimental study of spin-to-charge current conversion (SCC) phenomena that occur in systems with spin-orbit coupling: spin Hall effect (SHE) and anomalous Hall effect (AHE). The main objective ... -
Study of geometrical frustration and thermal activation in arrays of magnetic nanostructures
Pancaldi, Matteo (2018-06-18)La tesis trata de nanoescructuras magnéticas, definidas por la disminución de sus tres dimensiones hasta cientos de nanómetros y formadas por materiales magnéticos. La introducción de interacciones en un conjunto de ... -
Study of the photoluminescence of 2D metal-halide perovskite materials
Arriola Carril, Luis (2023-05-10)[EN] Hybrid organic-inorganic metal halide perovskites have emerged as promising materials in the development of optoelectronic devices, namely due to their high optical absorption coefficient, tuneable bandgap and charge ... -
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Substrate-enhanced and subsurface infrared near-field spectroscopy of organic layers
Mester, Lars (2021-01-18)La nano-espectroscopía infrarroja, basada en espectroscopía de transformada de Fourier de campo cercano (nano-FTIR), es una herramienta potente que permite la identificación química de materiales con una resolución espacial ... -
The atomic-scale limits of magnetism and superconductivity explored by electron excitations in tunneling spectroscopy
Rubio Verdú, Carmen (2019-01-25)Esta tesis estudia los fenómenos de magnetismo y superconductividad a escala atómica por medio de Microscopía y Espectroscopía de Efecto Túnel a bajas temperaturas (STM/STS) en condiciones de ultra-alto vacío. Estos ... -
Theory of ultrafast electron transfer from localized quantum states at surfaces .
Müller, Moritz (2019-04-05)The ability of materials to transfer electrons is a basic property controlling the functionality and performance of devices at the nanoscale. Of particular importance is the tranfor of electros at surfaces as a fundamental ... -
Vapor phase infiltration (VPI) and doping of conducting polymers
Wang, Weike (2017-10-10)In this thesis, the "Vapor Phase infiltration"(VPI), a vacuum based process derived from the atomic layer deposition (ALD), is used for the top-down infiltration and doping of various conducting polymers. In the first part ... -
Vapour phase modification of kevlar fibres
Azpitarte Iraculis, Itxasne (2018-11-28)Nature has always been a great source of inspiration for the human being in general and for material scientists in particular. Over millions of years of evolution, nature has developed different strategies to adapt the ...