Publications associées à Ground states and low temperature phases of itinerant electrons interacting with classical fields: a review of rigorous results

Hidden, entangled and resonating order

In condensed matter systems, the atoms, electrons or spins can sometimes arrange themselves in ways that result in unexpected properties but that cannot be detected by conventional experimental probes. Several historical and contemporary examples of such h ...

NATURE PUBLISHING GROUP2020

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

Elementary excitation in the spin-stripe phase in quantum chains

Helmuth Berger, Jonathan White

Elementary excitations in condensed matter capture the complex many-body dynamics of interacting basic entities in a simple quasiparticle picture. In magnetic systems the most established quasiparticles are magnons, collective excitations that reside in or ...

Springer2019

Fast and ultrafast electron microscopies for skyrmions and plasmonics

Gabriele Berruto

In recent years, topology gained a central role in physics. We learnt that energetics could be often explained better by classes of objects defined by having qualitative differences. In today's jargon, we say they are topologically distinct. The process of ...

EPFL2019

Enhanced Electron-Phonon Interaction in Multivalley Materials

Nicola Marzari, Marco Gibertini, Helmuth Berger, Thibault Daniel Pierre Sohier, Evgeniy Ponomarev

We report a combined experimental and theoretical investigation that reveals a new mechanism responsible for the enhancement of electron-phonon coupling in doped semiconductors in which multiple inequivalent valleys are simultaneously populated. Using Rama ...

AMER PHYSICAL SOC2019

Self-consistent site-dependent DFT plus U study of stoichiometric and defective SrMnO3

Nicola Marzari, Iurii Timrov, Ulrich Aschauer, Matteo Cococcioni

We propose a self-consistent site-dependent Hubbard U approach for density functional theory (DFT)+U calculations of defects in complex transition metal oxides, using Hubbard parameters computed via linear response theory. The formation of a defect locally ...

AMER PHYSICAL SOC2019

Exploring the Kondo Effect of an Extended Impurity with Chains of Co Adatoms in a Magnetic Field

Frédéric Mila

Motivated by recent STM experiments, we explore the magnetic field induced Kondo effect that takes place at symmetry protected level crossings in finite Co adatom chains. We argue that the effective two-level system realized at a level crossing acts as an ...

AMER PHYSICAL SOC2019

Charge transport properties of spin-orbit coupled materials in different correlation regimes

Soudabeh Sheikholharam Mashhadi

From recent advances in solid state physics, a novel material classification scheme has evolved which is based on the concept of topology and provides an understanding of different phenomena ranging from quantum transport to unusual flavors of superconduct ...

EPFL2018

Magnetic properties of surface-adsorbed single rare earth atoms, molecules, and atomic scale clusters

Aparajita Singha

This thesis presents combined experimental and theoretical investigations of nanoscale, surface-supported magnets based on rare earths (RE) to understand and control the magnetic properties down to the scale of single atoms. We present the effects of adato ...

EPFL2017

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

Lin Yang

In this thesis I study the synthesis and basic physical properties characterization on 3

d

, 4

d

and 5

d

transition metal compounds. Great success has been obtained in 3

d

transition metal compounds, in which the electric states are well localized due t ...

EPFL2017

Ground states and low temperature phases of itinerant electrons interacting with classical fields: a review of rigorous results

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Hidden, entangled and resonating order

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Elementary excitation in the spin-stripe phase in quantum chains

Fast and ultrafast electron microscopies for skyrmions and plasmonics

Enhanced Electron-Phonon Interaction in Multivalley Materials

Self-consistent site-dependent DFT plus U study of stoichiometric and defective SrMnO3

Exploring the Kondo Effect of an Extended Impurity with Chains of Co Adatoms in a Magnetic Field

Charge transport properties of spin-orbit coupled materials in different correlation regimes

Magnetic properties of surface-adsorbed single rare earth atoms, molecules, and atomic scale clusters

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

Hidden, entangled and resonating order

Fast and ultrafast electron microscopies for skyrmions and plasmonics

Elementary excitation in the spin-stripe phase in quantum chains

Crystalline and correlated phases in two-dimensional transition metal dichalcogenides

Exploring the Kondo Effect of an Extended Impurity with Chains of Co Adatoms in a Magnetic Field

Enhanced Electron-Phonon Interaction in Multivalley Materials

Self-consistent site-dependent DFT plus U study of stoichiometric and defective SrMnO3

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

Charge transport properties of spin-orbit coupled materials in different correlation regimes

Magnetic properties of surface-adsorbed single rare earth atoms, molecules, and atomic scale clusters