Publication
On field effect studies and superconductor-insulator transition in high-Tc cuprates
Publications associées (44)
Thermopower as a Unique Tool to Probe Quantum Phase Transitions
In my thesis, transport measurements such as resistivity and, more importantly, thermopower S, were used to explore the phase diagram of bad metals. Bad metals are electronically correlated systems whose ground state lies close to a quantum phase transitio ...
EPFL2012Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3O6.67
Superconductivity often emerges in the proximity of, or in competition with, symmetry-breaking ground states such as antiferromagnetism or charge density waves(1-5) (CDW). A number of materials in the cuprate family, which includes the high transition-temp ...
Nature Publishing Group2012Fermi-surface reconstruction by stripe order in cuprate superconductors
The origin of pairing in a superconductor resides in the underlying normal state. In the cuprate high-temperature superconductor YBa2Cu 3Oy (YBCO), application of a magnetic field to suppress superconductivity reveals a ground state that appears to break t ...
2011Superconductor–insulator transition in La2 − xSrxCuO4 at the pair quantum resistance
Davor Pavuna, Guy Joseph Günter Dubuis, Ivan Bozovic
High-temperature superconductivity in copper oxides arises when a parent insulator compound is doped beyond some critical concentration; what exactly happens at this superconductor–insulator transition is a key open question1. The cleanest approach is to t ...
2011Status Report of the EDIPO Project
Pierluigi Bruzzone, Rainer Wesche, Martin Vogel
The aim of this paper is to present an up to date review of the status of the European DIPOle (EDIPO) project whose objective is to build a new facility to perform both DC and AC tests of large superconductor samples in high magnetic background field (up t ...
2011Vison excitations in near-critical quantum dimer models
We study vison excitations in a quantum dimer model interpolating between the Rokhsar-Kivelson models on the square and triangular lattices. In the square-lattice case, the model is known to be critical and characterized by U(1) topological quantum numbers ...
2011Nernst and Seebeck Coefficients of the Cuprate Superconductor YBa_{2}Cu_{3}O_{6.67}: A Study of Fermi Surface Reconstruction
The Seebeck and Nernst coefficients S and ν of the cuprate superconductor YBa2Cu3Oy (YBCO) were measured in a single crystal with doping p=0.12 in magnetic fields up to H=28T. Down to T=9 K, ν becomes independent of field by H 30T, showing that superconduc ...
2010Resonating-valence-bond physics and topological order in two dimensions: from dimer models to high-temperature superconductivity
The notion of Z(2) topological order in two-dimensional resonating-valence-bond systems is reviewed. Using quantum dimer models as an example, I discuss general properties of the topological order and the resulting vortex-like excitations (visons). Some co ...
Amer Inst Physics, 2 Huntington Quadrangle, Ste 1No1 D, Melville, Ny 11747-4501 Usa2009Kinks in the angle resolved photoemission and inelastic x-ray spectra of high temperature superconductors
Though the high superconducting transition temperature (Tc) is the most interesting technological aspect of high temperature superconductors, the complex way in which the spin, lattice and electronic degrees of freedom interplay, makes them of the highest ...
EPFL2008Evaluation of two commercial finite element packages for calculating AC losses in 2-D high temperature superconducting strips
Francesco Grilli, Frédéric Sirois, François Roy, Bertrand Dutoit
This paper compares the speed and accuracy of two commercial packages based on the finite element method (FEM) for calculating the AC losses in high temperature superconductors (HTS). The softwares investigated in this paper were COMSOL Multiphysics and FL ...
2008