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Publications associées (26)

Primordial metallic melt in the deep mantle

Susannah McGregor Dorfman

Seismic tomography models reveal two large low shear velocity provinces (LLSVPs) that identify large-scale variations in temperature and composition in the deep mantle. Other characteristics include elevated density, elevated bulk sound speed, and sharp bo ...

Amer Geophysical Union2016

Sc2Ga2CuO7: A possible quantum spin liquid near the percolation threshold

Henrik Moodysson Rønnow, Paul Gregory Freeman

Sc2Ga2CuO7 (SGCO) crystallizes in a hexagonal structure (space group: P63/mmc), which can be seen as an alternating stacking of single and double triangular layers. Combining neutron, x-ray, and resonant x-ray diffraction, we establish that the single tria ...

2015

n(+)-GaN grown by ammonia molecular beam epitaxy: Application to regrown contacts

Nicolas Grandjean, Jean-François Carlin, Etienne François Olivier Giraud, Marco Malinverni, Lorenzo Lugani, Daniel Marti

We report on the low-temperature growth of heavily Si-doped (>10(20) cm(-3)) n(+)-type GaN by N-rich ammonia molecular beam epitaxy (MBE) with very low bulk resistivity (

Amer Inst Physics2014

The product of microbial uranium reduction includes multiple species with U(IV)-phosphate coordination

Rizlan Bernier-Latmani, Daniel Scott Alessi

Until recently, the reduction of U(VI) to U(IV) during bioremediation was assumed to produce solely the sparingly soluble mineral uraninite, UO2(s). However, results from several laboratories reveal other species of U(IV) characterized by the absence of an ...

Elsevier2014

Beam-induced oxidation of monomeric U(IV) species

Rizlan Bernier-Latmani, Benjamin Uster, Camelia Borca, Daniel Scott Alessi

Uranium L-III-edge X-ray absorption spectroscopy is often used to probe the oxidation state and coordination of uranium in environmental samples, and micrometre-sized beams can be used to spatially map the distribution of uranium relative to other elements ...

International Union of Crystallography2013

How are small endohedral silicon clusters stabilized?

Anne-Clémence Corminboeuf, Fabrice Avaltroni

Clusters in the (Be, B, C)@Si-n((0,1,2+)) (n = 6-10) series, isoelectronic to Si-n(2-), present multiple symmetric structures, including rings, cages and open structures, which the doping atom stabilizes using contrasting bonding mechanisms. The most strik ...

Royal Society of Chemistry2012

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