Publications related to Probing two- and three-dimensional electrons in MgB2 with soft x-ray angle-resolved photoemission

Experimental studies of the equilibrium and out-of-equilibrium electronic structure of non-symmorphic topological materials

Symmetry and topology are fundamental properties of nature. Mathematics provides us with a general framework to understand these concepts. On one side, symmetry describes the invariance properties of an object for specific transformations. On the other sid ...

EPFL2020

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Diego José Pasquier

This thesis is dedicated to the study of various aspects of the electronic structure of two-dimensional transition metal dichalcogenides (TMDs) of chemical composition MX

_2

(where M is a transition metal atom and X= S, Se, Te), using a combination of \te ...

EPFL2019

Precision and efficiency in solid-state pseudopotential calculations

Nicola Marzari, Nicolas Frank Mounet, Antimo Marrazzo, Ivano Eligio Castelli, Gianluca Prandini

Despite the enormous success and popularity of density-functional theory, systematic verification and validation studies are still limited in number and scope. Here, we propose a protocol to test publicly available pseudopotential libraries, based on sever ...

2018

Bulk diffusive relaxation mechanisms in optically excited topological insulators

Arnaud Magrez, Helmuth Berger, Philippe Bugnon, Alberto Crepaldi

The possibility to inject spin currents in topological insulators (TIs) by ultrashort optical pulses has stimulated intense studies of their out-of-equilibrium electronic properties. However, a comprehensive description of the electronic relaxation dynamic ...

Amer Physical Soc2017

Electronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate LiCu2O2

Marco Grioni, Arnaud Magrez, Helmuth Berger, Philippe Bugnon, Luca Moreschini, Simon Karl Moser, Gianmarco Gatti

We measured, by angle-resolved photoemission spectroscopy, the electronic structure of LiCu2O2, a mixed-valence cuprate where planes of Cu(I) (3d(10)) ions are sandwiched between layers containing one-dimensional edge-sharing Cu(II) (3d(9)) chains. We find ...

Amer Physical Soc2017

Identification of Semiconductor Defects through Constant-Fermi-Level Ab Initio Molecular Dynamics: Application to GaAs

Alfredo Pasquarello, Assil Bouzid

We show that constant-Fermi-level ab initio molecular dynamics can be used as a computer-based tool to reveal and control relevant defects in semiconductor materials. In this scheme, the Fermi level can be set at any position within the band gap during the ...

Amer Physical Soc2017

Manipulation of the Two-Dimensional States at Titanates Surfaces studied by ARPES

Stefan Peter Muff

The transition metal oxides are known for their versatile physical properties and are therefore an active field of research towards possible new functionalities and applications. This thesis focuses on the subgroup of titanates with perovskite structure th ...

EPFL2017

Indium selenide: an insight into electronic band structure and surface excitations

Davide Campi

We have investigated the electronic response of single crystals of indium selenide by means of angle-resolved photoemission spectroscopy, electron energy loss spectroscopy and density functional theory. The loss spectrum of indium selenide shows the direct ...

Nature Publishing Group2017

Investigation of interactions in two-dimensional electron gases with angular resolved photoemission spectroscopy

Carola Strasser

In this thesis, angular resolved photoemission spectroscopy (ARPES) is used to study the electronic structure of different two-dimensional electron systems (2DES). This technique is very surface sensitive and the most direct method to probe the surface ban ...

EPFL2015

Bulk and surface band structure of the new family of semiconductors BiTeX (X=I, Br, Cl)

Marco Grioni, Arnaud Magrez, Oleg Yazyev, Helmuth Berger, Philippe Bugnon, Alberto Crepaldi, Gabriel Albert Autes, Luca Moreschini, Simon Karl Moser, Jens Christian Johannsen

We present an overview of the new family of semiconductors BiTeX (X = I, Br, Cl) from the perspective of angle resolved photoemission spectroscopy. The strong band bending occurring at the surface potentially endows them with a large flexibility, as they a ...

Elsevier2015

Probing two- and three-dimensional electrons in MgB2 with soft x-ray angle-resolved photoemission

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Experimental studies of the equilibrium and out-of-equilibrium electronic structure of non-symmorphic topological materials

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Precision and efficiency in solid-state pseudopotential calculations

Bulk diffusive relaxation mechanisms in optically excited topological insulators

Electronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate LiCu2O2

Identification of Semiconductor Defects through Constant-Fermi-Level Ab Initio Molecular Dynamics: Application to GaAs

Manipulation of the Two-Dimensional States at Titanates Surfaces studied by ARPES

Indium selenide: an insight into electronic band structure and surface excitations

Investigation of interactions in two-dimensional electron gases with angular resolved photoemission spectroscopy

Bulk and surface band structure of the new family of semiconductors BiTeX (X=I, Br, Cl)

Identification of Semiconductor Defects through Constant-Fermi-Level Ab Initio Molecular Dynamics: Application to GaAs

Bulk diffusive relaxation mechanisms in optically excited topological insulators

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Experimental studies of the equilibrium and out-of-equilibrium electronic structure of non-symmorphic topological materials

Manipulation of the Two-Dimensional States at Titanates Surfaces studied by ARPES

Investigation of interactions in two-dimensional electron gases with angular resolved photoemission spectroscopy

Precision and efficiency in solid-state pseudopotential calculations

Electronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate LiCu2O2

Indium selenide: an insight into electronic band structure and surface excitations

Bulk and surface band structure of the new family of semiconductors BiTeX (X=I, Br, Cl)