3D EDX microanalysis by FIB-SEM: Elemental quantification enhancement

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 - August 2, 201

Transport and magnetic properties in YBaCo2O5.45: Focus on the high-temperature transition

The electronic transport properties and the magnetic susceptibility were measured in detail in $YBaCo_2O_{5.45}$. Close to the so-called metal-insulator transition, strong effects of resistance relaxation, a clear thermal hysteresis and a sudden increase of the resistance noise are observed. This is likely due to the first order character of the transition and to the underlying phases coexistence. Despite these out of equilibrium features, a positive and linear magneto-resistance is also observed, possibly linked to the heterogeneity of the state. From a magnetic point of view, the paramagnetic to ordered magnetic state transition is observed using non linear susceptibilty. This transition shows the characteristics of a continuous transition, and time dependent effects can be linked with the dynamics of magnetic domains in presence of disorder. Thus, when focusing on the order of the transitions, the electronic one and the magnetic one can not be directly associated.Comment: accepted for publication in PR

Focused Ion Beam Nano-Tomography Using Different Detectors

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7-August 11, 201

Cathodoluminescence in a (S)TEM - Exploring Possibilities and Limits

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 - August 5, 201

Multivariate Statistical Analysis tool for the interpretation and the quantification of hyperspectral data: application to 3D EDX/FIB images

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 - August 2, 201

3D EDX Microanalysis by FIB-SEM: Enhancement of Elemental Quantification

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7-August 11, 201

Filling-induced Mott transition and pseudogap physics in the triangular lattice Hubbard model

It has been reported that upon doping a Mott insulator, there can be a crossover to a strongly correlated metallic phase followed by a first-order transition to another thermodynamically stable metallic phase. We call this first-order metal-metal transition the Sordi transition. To show theoretically that this transition is observable, it is important to provide calculations in situations where magnetic phase transitions do not hide the Sordi transition. It is also important to show that it can be found on large clusters and with different approaches. Here, we use the dynamical cluster approximation to reveal the Sordi transition on a triangular lattice at finite temperature in situations where there is no long-range magnetic correlations. This is relevant for experiments on candidate spin-liquid organics. We also show that the metallic phase closest to the insulator is a distinct pseudogap phase that occurs because of strong interactions and short-range correlations