Université de Neuchâtel

Exciton condensation in 1T-TiSe2 : a photoemission study and its theoretical model

Monney, Claude ; Aebi, Philippe (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2009 ; Th. 2135.

Dans cette thèse, de nouvelles données de spectroscopie de photoémission résolue en angle sont confrontées aux prédictions du modèle théorique de la phase de condensat d’excitons afin d’aborder la question de la transition vers la phase d’onde de densité de charge apparaissant dans le dichalcogénure de métal de transition, 1T-TiSe2. Des aspects expérimentaux et...

Université de Neuchâtel

Photoemission of switchable mirrors and quantum wells

Koitzsch, Christian ; Aebi, Philippe (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2004 ; 1826.

This thesis focuses on the electronic properties of materials, which were explored with Angle Resolved Photoemission (ARPES) and Density Functional Theory (DFT). The natural fingerprint of electronic phenomena in crystalline solids, e.g. in this thesis the hydrogen-induced metal-insulator transition and the formation of standing electron waves in quantum wells, is the k-resolved band structure or...

Université de Neuchâtel

Probing nanoscale ferroelectricity by photoelectron diffraction

Despont, Laurent ; Aebi, Philippe (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; 1942.

This thesis is based on research carried out at the Institut de Physique, Université de Neuchâtel, Switzerland during the period 2003 - 2007, in collaboration with the DPMC, University of Geneva, where the samples have been grown. A ferroelectric is generally defined as a material with two or more stable states of different non-zero intrinsic lattice polarization which can be reversed through...