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Now showing items 31-40 of 93
Efficient Gate-tunable light-emitting device made of defective boron nitride nanotubes: from ultraviolet to the visible
(Nature Publishing Group, 2013-09)
Boron nitride is a promising material for nanotechnology applications due to its two-dimensional graphene-like, insulating, and highly-resistant structure. Recently it has received a lot of attention as a substrate to grow ...
Long-lived oscillatory incoherent electron dynamics in molecules: trans-polyacetylene oligomers
(IOP Publishing, 2013-04)
We identify an intriguing feature of the electron-vibrational dynamics of molecular systems via a computational examination of trans-polyacetylene oligomers. Here, via the vibronic interactions, the decay of an electron ...
Spin orbitronics in metals
(2015-12-10)
El trabajo realizado en esta tesis se centra en el estudio de la inyección,transporte y detección de corrientes puras de espín en metales. Una de lasmaneras para crear y detectar estas corrientes es utilizando electrodos ...
Analysis and control of transient spectra using time-dependent density functional theory.
(2016-01-29)
Attosecond-transient absorption spectroscopy and attosecond time-resolved photoelectronspectroscopy based on pump-probe setups have recently become possibledue to the availability of ultra-fast pulsed laser sources. These ...
Quantum Electrodynamical time-dependent density functional theory
(2017-09-21)
The last two decades have witnessed increasing experimental interest in the study and control of many-electron systems strongly interacting with quantum electromagnetic fields. This includes notable experiments in the areas ...
Structural and Electronic Properties of Low-Dimensional C-Nanoassemblies and Possible Analogues for Si (and Ge)
(Hindawi Publishing Corporation, 2011)
The delocalised nature of p-electrons in carbon-based compounds has opened a huge path for new fundamental and technological developments using carbon-based materials of different dimensionality (from clusters, to surfaces, ...
Time-dependent electron phenomena at surfaces
(US National Academy of Sciences, 2011-01)
Femtosecond and subfemtosecond time scales typically rule electron dynamics at metal surfaces. Recent advance in experimental techniques permits now remarkable precision in the description of these processes. In particular, ...
Ab initio molecular dynamics on the electronic Boltzmann equilibrium distribution
(IOP Publishing, 2010-08-31)
We prove that for a combined system of classical and quantum particles, it is possible to describe a dynamics for the classical particles that incorporates in a natural way the Boltzmann equilibrium population for the ...
Electronic properties of graphene grain boundaries
(IOP Publishing, 2014-08-08)
Grain boundaries and defect lines in graphene are intensively studied for their novel electronic and magnetic properties. However, there is not a complete comprehension of the appearance of localized states along these ...
Spectroscopic analysis of atoms and molecules
(2015-09-11)
En esta tesis he estudiado varios aspectos de la respuesta espectroscópica de varios átomos y moléculas a una fuente electromagnética externa. Entender dicha respuesta cuántica tanto nuclear como electrónica es muy complicado, ...