Publications related to Adatom

Selective area epitaxy of GaAs: the unintuitive role of feature size and pitch

Anna Fontcuberta i Morral, Lucas Güniat, Didem Dede, Valerio Piazza, Martin George Friedl, Elif Nur Dayi, Nicholas Paul Morgan, Akshay Balgarkashi, Vladimir Dubrovskii

Selective area epitaxy (SAE) provides the path for scalable fabrication of semiconductor nanostructures in a device-compatible configuration. In the current paradigm, SAE is understood as localized epitaxy, and is modelled by combining planar and self-asse ...

IOP Publishing Ltd2022

Quantum dynamics in individual surface spins

Tobias Bilgeri

This thesis presents a combined experimental and theoretical study of the classical and quantum magnetization dynamics in single magnetic adatoms and molecules, and on the classical and quantum coherent control thereof. First, a detailed description of t ...

EPFL2021

Explaining Morphological and Electrical Features of Boron-doped Zinc Oxide to Tailor New Electrodes for Photovoltaics

Lorenzo Fanni

TCOs are a class of metal oxides that combine transparency to visible light with electrical conductivity. Each TCO is characterized by the trade-off of these two properties which can be tuned for a particular application. This thesis is dedicated to the in ...

EPFL2016

Low-temperature plasma-deposited silicon epitaxial films: Growth and properties

Christophe Ballif, Quentin Thomas Jeangros, Duncan Thomas Lindsay Alexander, Stefaan De Wolf, Johannes Peter Seif, Bénédicte Demaurex

Low-temperature (

American Institute of Physics2014

Hydrophobic coating of mica by stearic acid vapor deposition

Juan José Segura Sugranes

We report on the preparation of thin films of stearic acid on mica by sublimation in air. We correlate their affinity to water (hydrophobic vs. hydrophilic character) to the morphology of the films as observed by Atomic Force Miscorcopy (AFM). Submonolayer ...

Elsevier Science Bv2014

Electronic Transport in Graphene with Aggregated Hydrogen Adatoms

Oleg Yazyev, Gabriel Albert Autes, Fernando Gargiulo, Naunidh Singh Virk

Hydrogen adatoms and other species covalently bound to graphene act as resonant scattering centers affecting the electronic transport properties and inducing Anderson localization. We show that attractive interactions between adatoms on graphene and their ...

American Physical Society2014

Magnetism of Single Adatoms and Small Adsorbed Clusters Investigated by Means of Low-Temperature STM

Quentin Dubout

This thesis works reports on the magnetic properties of single transition metal atoms and hydrogenated compounds adsorbed on crystal surfaces. It is an experimental study, based on scanning tunneling microscopy (STM), initiated by the project of demonstrat ...

EPFL2013

Modeling Ruthenium-Dye-Sensitized TiO2 Surfaces Exposing the (001) or (101) Faces: A First-Principles Investigation

Michael Graetzel, Mohammad Khaja Nazeeruddin, Ladislav Kavan, Filippo de Angelis

We present a first-principles computational investigation on the adsorption mode and electronic structure of the highly efficient heteroleptic ruthenium dye C101, [NaRu(4,4'-bis(5-hexylthiophene-2-yl)-2,2'-bipyridine)(4-carboxylic acid-4'-carboxylate-2,2'- ...

American Chemical Society2012

Adsorption Properties of the Cu(115) Surface: Basic Interfaces

Amela Groso

The interfaces: K/Cu(115) and CO/Cu(115) have been characterized using surface sensitive techniques, including low energy electron diffraction and photoelectron spectroscopy. K adatoms show tendency to occupy the sites close to the step edges. At low tempe ...

2010

Spectroscopic manifestations of the Kondo effect on single adatoms

Wolf-Dieter Schneider, Markus Ternes

The present topical review focuses on recent advances concerning an intriguing phenomenon in condensed matter physics, the scattering of conduction electrons at the localized spin of a magnetic impurity: the Kondo effect. Spectroscopic signatures of this e ...

2009

A level set simulation for ordering of quantum dots via cleaved-edge overgrowth

Anna Fontcuberta i Morral, Emanuele Uccelli

Cleaved-edge overgrowth (CEO) is a promising technique to obtain ordered arrays of quantum dots, where the size and position of the dots can be controlled very well. We present level set simulations for CEO. Our simulations illustrate how the quality of th ...

American Institute of Physics2009

On the mechanisms of spontaneous growth of III-nitride nanocolumns by plasma-assisted molecular beam epitaxy

Jelena Ristic

A study of the GaN nanocolumns nucleation and growth by molecular beam epitaxy on Si(111) is presented. Ga droplets with different diameters (340-90 nm) were deposited on the substrate. prior to growth, to determine any effect on the nanocolumns size and d ...

2008

Stranski-Krastanov GaN/AlN quantum dots grown by metal organic vapor phase epitaxy

Nicolas Grandjean, Jean-François Carlin, Marc Ilegems, Raphaël Butté, Eric Feltin, Dobri Simeonov

We report a thorough study of the growth of self-assembled GaN/AlN quantum dots (QDs). These QDs were grown on sapphire substrates using the Stranski-Krastanov (SK) growth mode by means of low-pressure metal organic vapor phase epitaxy. The influence of th ...

2006

Neighbor driven mobility of silver adatoms on Pd(100) measured by thermal helium scattering

Wolfgang Harbich, René Monot

Thermal helium scattering is used to characterize the deposition of silver atoms on Pd (100) in the coverage range 0 to 10% of a monolayer, at surface temperature between 80 and 160 K, the latter being the threshold of adatom mobility. The attenuation of t ...

1994