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Complex Magnetic Exchange Coupling between Co Nanostructures and Ni(111) across Epitaxial Graphene

Harald Brune, François Patthey, Stefano Rusponi, Marina Pivetta, Pietro Gambardella, Fabio Donati

We report on the magnetic coupling between isolated Co atoms as well as small Co islands and Ni(111) mediated by an epitaxial graphene layer. X-ray magnetic circular dichroism and scanning tunneling microscopy combined with density functional theory calcul ...

American Chemical Society2016

Theory And Practice Of Uncommon Molecular Electronic Configurations

Anne-Clémence Corminboeuf, Ganna Gryn'ova

The electronic conﬁguration of the molecule is the foundation of its structure and reactivity. The spin state is one of the key characteristics arising from the ordering of electrons within the molecule’s set of orbitals. Organic molecules that have open-s ...

Wiley-Blackwell2015

Measuring absolute spin polarization in dissolution-DNP by Spin PolarimetrY Magnetic Resonance (SPY-MR)

Geoffrey Bodenhausen, Aurélien Bornet, Sami Jannin, Jonas Milani, Basile Vuichoud, Quentin Chappuis

Dynamic nuclear polarization at 1.2 K and 6.7 T allows one to achieve spin temperatures on the order of a few millikelvin, so that the high-temperature approximation (Delta E < kT) is violated for the nuclear Zeeman interaction Delta E = gamma B(0)h/(2 pi) ...

Academic Press Inc - Elsevier Science2015

Adjusting the Local Arrangement of π‑Stacked Oligothiophenes through Hydrogen Bonds: A Viable Route to Promote Charge Transfer

Anne-Clémence Corminboeuf, Antonio Prlj, Jérôme Florian Gonthier, Eric Albert Georges Bremond, Hongguang Liu

We show that substituting quaterthiophene cores with strong H-bond aggregators, such as urea groups, provides an efficient way to adjust the mutual in-plane displacements of the semiconducting units and promote charge transfer. Our 2-D structure-property m ...

Amer Chemical Soc2014

Proof of principle demonstration of a self-tracking concentrator

Christophe Moser, Eric Tremblay, Volker Günter Zagolla

We present to the best of our knowledge the first successful demonstration of a planar, self-tracking solar concentrator system capable of a 2-dimensional angular acceptance of over 40 degrees. The light responsive mechanism allows for efficient waveguide ...

Optical Society of America2014

Two-dimensional short-range interacting attractive and repulsive Fermi gases at zero temperature

Gianluca Bertaina

We study a two-dimensional two-component Fermi gas with attractive or repulsive short-range interactions at zero temperature. We use Diffusion Monte Carlo with Fixed Node approximation in order to calculate the energy per particle and the opposite spin pai ...

Springer2013

Long-Lived States to Monitor Protein Unfolding by Proton NMR

Geoffrey Bodenhausen, Aurélien Bornet, Paul Romeo Vasos, Riddhiman Sarkar, Puneet Ahuja

The relaxation of long-lived states (LLS) corresponds to the slow return to statistical thermal equilibrium between symmetric and antisymmetric proton spin states. This process is remarkably sensitive to the presence of external spins and can be used to ob ...

Wiley-Blackwell2011

Searching for dark matter in X-rays: how to check the dark matter origin of a spectral feature

Alexey Boyarsky, Oleg Ruchayskiy

A signal from decaying dark matter (DM) can be unambiguously distinguished from spectral features of astrophysical or instrumental origin by studying its spatial distribution. We demonstrate this approach by examining the recent claim of Loewenstein and Ku ...

Blackwell Publishing Ltd, Oxford2010

Role of fermion exchanges in statistical signatures of composite bosons

Marc-André Dupertuis

We study statistical signatures of composite bosons made of two fermions by extending number states to these quantum particles. Two-particle correlations as well as the dispersion of the probability distribution are analyzed. We show that the particle comp ...

2009

Validation of Monte-Carlo simulations with measurements at the ICON beam-line at SINQ

ICON is the new cold neutron imaging facility at the neutron spallation source SINQ. The ICON facility is placed at beam-line S52 with direct view to the cold liquid D-2 moderator. The beam-line includes a 4.4 m long collimation section followed by a 1 I m ...

2008

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