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Local Theory of the Insulating State

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Controlled stripes of ultrafine ferroelectric domains

Nava Setter, Alexander Tagantsev, Igor Stolichnov, Tomas Sluka, Silviu Cosmin Sandu, Petr Yudin, Ludwig Feigl, Xiankui Wei, Mahamudu Mtebwa, Konstantin Shapovalov

In the pursuit of ferroic-based (nano) electronics, it is essential to minutely control domain patterns and domain switching. The ability to control domain width, orientation and position is a prerequisite for circuitry based on fine domains. Here, we deve ...

Nature Publishing Group2014

Orbital Magnetization as a Local Property

The modern expressions for polarization P and orbital magnetization M are k-space integrals. But a genuine bulk property should also be expressible in r space, as an unambiguous function of the ground-state density matrix, "nearsighted'' in insulators, ind ...

Amer Physical Soc2013

Electronic fine structure calculation of [Gd(DOTA)(H2O)]- using LF-DFT: The zero field splitting

Lothar Helm, Alain Borel

Zerfo field splitting plays an important role in determining the electron spin relaxation of Gd(III) in solution. We understand the ZFS as an effect depending on the f electron structure and treat it in the framework of ligand field-density functional theo ...

2012

Heated membranes for stencil lithography application

Sahbi Boujnah

This project aims to improve the technique of self-cleaning stencil based on heated membranes and minimize the clogging of stencil’s apertures. To this end, theory on vapor condensation has been developed for Aluminum, Chromium, Titanium, Gold and Platinum ...

2012

Parallel symbolic execution for automated real-world software testing

George Candea, Cristian Zamfir, Vlad Ureche, Stefan Bucur

This paper introduces Cloud9, a platform for automated testing of real-world software. Our main contribution is the scalable parallelization of symbolic execution on clusters of commodity hardware, to help cope with path explosion. Cloud9 provides a system ...

ACM Press2011

Numerical capture of wing tip vortex improved by mesh adaptation

François Avellan, Olivier Braun, Eric Joubarne

This paper presents a mesh adaptation procedure linked to a finite volume solver, the goal of which is to increase the precision of the numerical simulation of a wing tip vortex flow. The adaptation scheme is applied to hexahedron meshes and hybrid meshes ...

2011

Transactional memory, linking theory and practice

Vincent Gramoli, Srivatsan Ravi

Transactional memory appears promising for democratizing concurrent programming. Its potential lies in producing code that is extensible as atomicity is preserved under composition of transactions. This new abstraction raises several challenges such as the ...

2010

Transactional Memory: Glimmer of a Theory

Rachid Guerraoui, Michal Kapalka

Transactional memory (TM) is a promising paradigm for concurrent programming. This paper is an overview of our recent theoretical work on defining a theory of TM. We first recall some TM correctness properties and then overview results on the inherent powe ...

ACM2009

On the Role of Low-Energy CP Violation in Leptogenesis

Steve Blanchet

The link between low-energy CP violation and leptogenesis became more accessible with the understanding of flavor effects. However, a definite well-motivated model where such a link occurs was still lacking. Adjoint SU(5) is a simple grand unified theory w ...

2008

Structural properties of amorphous GeSe2

Alfredo Pasquarello

By using first-principles molecular dynamics within density functional theory, we study the structural properties of amorphous GeSe2 at T = 300 K. The amorphous configurations have been obtained via cooling from the liquid state followed by extensive relax ...

2007