Publications de Jean-David Picon

Unconventional magnetization plateaus in a Shastry-Sutherland spin tube

Jean-David Picon, Frédéric Mila, Salvatore Manmana

Using density matrix renormalization group (DMRG) and perturbative continuous unitary transformations (PCUTs), we study the magnetization process in a magnetic field for all coupling strengths of a quasi-1D version of the 2D Shastry-Sutherland lattice, a f ...

2011

Phase diagram of the fully frustrated transverse-field Ising model on the honeycomb lattice

Jean-David Picon, Frédéric Mila, Tommaso Coletta

Motivated by the current interest in the quantum dimer model on the triangular lattice, we investigate the phase diagram of the closely related fully frustrated transverse-field Ising model on the honeycomb lattice using classical and semiclassical approxi ...

2011

Phase separation versus supersolid behavior in frustrated antiferromagnets

Jean-David Picon, Frédéric Mila, Nicolas Laflorencie

We investigate the competition between spin supersolidity and phase separation in a frustrated spin-half model of weakly coupled dimers. We start by considering systems of hard-core bosons on the square lattice, onto which the low-energy physics of the her ...

2011

The ALPS project release 2.0: open source software for strongly correlated systems

Jean-David Picon

We present release 2.0 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an open source software project to develop libraries and application programs for the simulation of strongly correlated quantum lattice models such as quantum ma ...

2011

Supersolid Phase with Cold Polar Molecules on a Triangular Lattice

Jean-David Picon

We study a system of heteronuclear molecules on a triangular lattice and analyze the potential of this system for the experimental realization of a supersolid phase. The ground state phase diagram contains superfluid, solid, and supersolid phases. At finit ...

2010

Frustration- induced plateaus in S >= 1/2 Heisenberg spin ladders

Jean-David Picon, Frédéric Mila, Tommaso Coletta, Frédéric Alexis Michaud, Salvatore Manmana

We study the T=0 magnetization of frustrated two-leg spin ladders with arbitrary value of the spin S. In the strong-rung limit, we use degenerate perturbation theory to prove that frustration leads to magnetization plateaus at fractional values of the magn ...

2010

Mechanisms for spin supersolidity in S=1/2 spin-dimer antiferromagnets

Jean-David Picon, Frédéric Mila, Nicolas Laflorencie

Using perturbative expansions and the contractor renormalization (CORE) algorithm, we obtain effective hard-core bosonic Hamiltonians describing the low-energy physics of S=1/2 spin-dimer antiferromagnets known to display supersolid phases under an applied ...

2008

Quantum coherence and carriers mobility in organic semiconductors

Libero Zuppiroli, Marie-Noëlle Bussac, Jean-David Picon

We present a model of charge transport in organic molecular semiconductors based on the effects of lattice fluctuations on the quantum coherence of the electronic state of the charge carrier. Thermal intermolecular phonons and librations tend to localize p ...

2007

Polarization effects in the channel of an organic field-effect transistor

Libero Zuppiroli, Marie-Noëlle Bussac, Jean-David Picon, Hocine Houili

We present the results of our calculation of the effects of dynamical coupling of a charge carrier to the electronic polarization and the field-induced lattice displacements at the gate interface of an organic field-effect transistor (OFET). We find that t ...

American Institute of Physics Inc.2006

De l'effet de la polarisation électronique sur le transport de charge dans les semi-conducteurs moléculaires

Jean-David Picon

This work aims at a better understanding of transport mechanisms which take place in organic semiconductors such as pentacene. More accurately, we believe that the electronic polarization plays a leading part, which we try to identify in the particular cas ...

EPFL2006