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21 papers · 1 filter
Electrically-tunable hole g-factor of an optically-active quantum dot for fast spin rotations
Jonathan H. Prechtel, Franziska Maier, Julien Houel +5
We report a large g-factor tunability of a single hole spin in an InGaAs quantum dot via an electric field. The magnetic field lies in the in-plane direction x, the direction requi…
Correlation between crystalline order and vitrification in colloidal monolayers
Elisa Tamborini, C. Patrick Royall, Pietro Cicuta
We investigate experimentally the relationship between local structure and dynamical arrest in a quasi-2d colloidal model system which approximates hard discs. We introduce polydis…
Influence of fine particles on the stability of a humid granular pile
Xixi Huang, Sandrine Bec, J. Colombani
We have investigated by rotating drum experiments the influence of a small amount of fine particles on the stability of a granular heap. The fine particles are shown to have a stro…
Estimating Excitonic Effects in the Absorption Spectra of Solids: Problems and Insight from a Guided Iteration Scheme
Santiago Rigamonti, Silvana Botti, Valérie Veniard +3
A major obstacle for computing optical spectra of solids is the lack of reliable approximations for capturing excitonic effects within time-dependent density-functional theory. We…
Interplay between Raman shift and thermal expansion in graphene: temperature-dependent measurements and analysis of substrate corrections
S. Linas, Y. Magnin, B. Poinsot +12
Measurements and calculations have shown significant disagreement regarding the sign and variations of the thermal expansion coefficient (TEC) of graphene . Here we report de…
Dynamical Backaction Cooling with Free Electrons
A. Niguès, A. Siria, P. Verlot
The ability to cool single ions, atomic ensembles, and more recently macroscopic degrees of freedom down to the quantum groundstate has generated considerable progress and perspect…