Publications related to VO2:Ge based thermochromic solar absorber coatings

Competing charge density waves and temperature-dependent nesting in 2H-TaSe2

Multiple charge density wave (CDW) phases in 2H-TaSe2 are investigated by high-resolution synchrotron x-ray diffraction. In a narrow temperature range immediately above the commensurate CDW transition, we observe a multi-q superstructure with coexisting co ...

2011

A spinning thermometer to monitor microwave heating and glass transitions in dynamic nuclear polarization

Geoffrey Bodenhausen, Sandrine Gerber, Pascal Miéville, Sami Jannin, Marc Anthony Caporini

As previously demonstrated by Thurber and Tycko, the peak position of Br-79 in potassium bromide (KBr) allows one to determine the temperature of a spinning sample. We propose to adapt the original design by using a compact KBr tablet placed at the bottom ...

Wiley-Blackwell2011

First-Principles Study of the High-Temperature Phase of Li

Michele Ceriotti, Giacomo Francesco Leonardo Miceli, Michele Parrinello

On the basis of ab initio molecular dynamics simulations, we propose that the Fm3̄m symmetry of the high-temperature (above 356 K) phase of Li 2NH results from dynamical disorder due to fast diffusion of Li interstitials and a slower diffusion of Li vacanc ...

2011

Thermochromic films of VO2:W for smart solar energy applications

Jean-Louis Scartezzini, Andreas Schueler, Rosendo Sanjines, Antonio Paone, Martin Joly

Overheating is a common problem both with the use of active and passive solar energy in thermal solar energy systems and in highly glazed buildings. In solar thermal collectors, the elevated temperatures occurring during stagnation result in reduced lifeti ...

SPIE, Bellingham, USA2009

Phase diagram of a polariton laser from cryogenic to room temperature

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Eric Feltin, Jacques Levrat, Gabriel Christmann

The signature of the strong-coupling regime is unambiguously evidenced in a GaN-based microcavity (MC) above the polariton lasing threshold P-thr at room temperature through the observation of the upper polariton branch. The MC system exhibits a renormaliz ...

2009

Decomposition of copper concentrates at high-temperatures: An efficient method to remove volatile impurities

Christian Ludwig

The thermal decomposition of three synthetic copper sulfides (chalcocite (Cu2S), chalcopyrite (CuFeS2), and enargite (Cu3AsS4)) and two commercial copper concentrates has been studied on a thermobalance (T = 1173-1773 K) and an imaging furnace (T approxima ...

Elsevier2008

Bone substitute: Transforming beta-tricalcium phosphate porous scaffolds into monetite

Jacques Lemaître, Thomas Köhler

The goal of the present study was to assess the possibility to change the composition of a calcium phosphate scaffold from a high-temperature phase to a phase only stable at or close to room temperature without macrostructural changes. For that purpose, ma ...

2008

Temperature-induced Phase Transitions in Micro-, Submicro-, and Nanocrystalline NaNbO3

Arnaud Magrez

Phase transitions in micro-, submicro-, and nanocrystalline NaNbO3 were investigated by temperature-tuning Raman spectroscopy and X-ray powder diffraction method. Three powders with different average particle size showed successive phase transitions within ...

2007

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

Tatjana Hählen

This report describes an AC-susceptibility study on

LiHo_xY_{1−x}F_4

.

LiHo_xY_{1−x}F_4 has different phases depending on the concentration x of holmium. Pure

LiHoF_4

is a ferromagnet, at concentrations of

x \approx 0.20$ it is a spin glass and at con ...

2007

Temperature-controlled martensitic phase transformations in a model NiAl alloy

Reversible martensitic phase transformations in a partially disordered Ni-Al alloy within the composition range from 60 to 65 at. % of Ni are investigated using molecular dynamics simulation. During a complete temperature cycle a wide hysteresis in enthalp ...

2006

VO2:Ge based thermochromic solar absorber coatings

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Competing charge density waves and temperature-dependent nesting in 2H-TaSe2

A spinning thermometer to monitor microwave heating and glass transitions in dynamic nuclear polarization

First-Principles Study of the High-Temperature Phase of Li

Thermochromic films of VO2:W for smart solar energy applications

Phase diagram of a polariton laser from cryogenic to room temperature

Decomposition of copper concentrates at high-temperatures: An efficient method to remove volatile impurities

Bone substitute: Transforming beta-tricalcium phosphate porous scaffolds into monetite

Temperature-induced Phase Transitions in Micro-, Submicro-, and Nanocrystalline NaNbO3

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

Temperature-controlled martensitic phase transformations in a model NiAl alloy

Thermochromic films of VO2:W for smart solar energy applications

Competing charge density waves and temperature-dependent nesting in 2H-TaSe2

Temperature-induced Phase Transitions in Micro-, Submicro-, and Nanocrystalline NaNbO3

Bone substitute: Transforming beta-tricalcium phosphate porous scaffolds into monetite

Temperature-controlled martensitic phase transformations in a model NiAl alloy

Phase diagram of a polariton laser from cryogenic to room temperature

Decomposition of copper concentrates at high-temperatures: An efficient method to remove volatile impurities

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

A spinning thermometer to monitor microwave heating and glass transitions in dynamic nuclear polarization

First-Principles Study of the High-Temperature Phase of Li