Dubois, C., Santi, G., Cuttat, I., Berthod, C., Jenkins, N., Petrović, A. P., ...
We performed the first scanning tunneling spectroscopy measurements on the pyrochlore superconductor KOs2O6 (Tc = 9.6 K) in both zero magnetic field and the vortex state at several temperatures above...
Node-like excitations in superconducting PbMo6S8 probed by scanning tunneling spectroscopy (2007)
Dubois, C., Petrovic, A. P., Santi, G., Berthod, C., Manuel, A. A., Decroux, M., ...
We present the first scanning tunneling spectroscopy study on the Chevrel phase PbMo6S8, an extreme type II superconductor with a coherence length only slightly larger than in high-Tc cuprates....
Hall effect in strongly correlated low dimensional systems (2006)
León, G., Berthod, C., Giamarchi, T.
We investigate the Hall effect in a quasi one-dimensional system made of weakly coupled Luttinger Liquids at half filling. Using a memory function approach, we compute the Hall coefficient as a...
Breakup of the Fermi surface near the Mott transition in low-dimensional systems (2006)
Berthod, C., Giamarchi, T., Biermann, S., Georges, A.
We investigate the Mott transition in weakly-coupled one-dimensional (1d) fermionic chains. Using a generalization of Dynamic Mean Field Theory, we show that the Mott gap is suppressed at some...
Interferometric coupling of the keck telescopes with single-mode fibers. (2006)
. Perrin, G., Woillez, J., Lai, O., Guerin, J., Kotani, T., Wizinowich, P.-L., ...
Di Ventra, M., Berthod, C., Binggeli, N.
We have investigated ab initio the existence of localized states and resonances in abrupt GaAs/Si/GaAs (110)- and (100)-oriented heterostructures incorporating 1 or 2 monolayers (MLs) of Si, as well...
Vorticity and vortex-core states (2004)
The origin of the vortex-core states in s-wave and d_{x^2-y^2}-wave superconductors is investigated by means of some selected numerical experiments. By relaxing the self-consistency condition in the...
Schottky barrier heights at polar metal/semiconductor interfaces (2003)
Berthod, C., Binggeli, N., Baldereschi, A.
Using a first-principle pseudopotential approach, we have investigated the Schottky barrier heights of abrupt Al/Ge, Al/GaAs, Al/AlAs, and Al/ZnSe (100) junctions, and their dependence on the...
Modeling scanning tunneling spectra of $Bi_2 Sr_2 CaCu_2 O_{8+\delta}$ (2002)
Hoogenboom, B. W., Berthod, C., Peter, M., Fischer, \O., Kordyuk, A. A.
Recent angle-resolved photoemission and neutron scattering data have provided new ingredients for the interpretation of scanning tunneling spectra on Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$. We analyze...
The Density of States in High-Tc Superconductors Vortices (2001)
We calculated the electronic structure of a vortex in a pseudogapped superconductor within a model featuring strong correlations. With increasing strength of the correlations, the BCS core states are...
Cooperon propagator description of high temperature superconductivity (2001)
A phenomenological description of the high-Tc superconductors based on the Cooperon propagator is presented. This model allows one to study the effects of local pairing correlations and long-range...
Gorkov equations for a pseudo-gapped high temperature superconductor (2000)
A theory of superconductivity based on the two-body Cooperon propagator is presented. This theory takes the form of a modified Gorkov equation for the Green's function and allows one to model the...