28 citations · 110 across the 16 of their papers we have counts for
9 papers · 1 filter
High pressure-temperature phase diagram of ammonia hemihydrate
L. Andriambariarijaona, F. Datchi H. Zhang, K. Béneut +3
We report a comprehensive experimental investigation of the phase diagram of ammonia hemihydrate (AHH) in the range of 2-30 GPa and 300-700 K, based on Raman spectroscopy and x-ray…
When carbon impurities trigger the synthesis of alpha boron at high pressure and high temperature
Amrita Chakraborti, Yeonsoo Cho, Jelena Sjakste +5
The role of carbon in the formation of alpha boron at high pressure and high temperature (HPHT) has been investigated by combining HPHT experiments and density functional theory (D…
Evidence for centrosymmetry breaking and multiferroic properties in the A-site ordered quadruple perovskite YMnMnO
M Verseils, F Mezzadri, D Delmonte +7
By means of single-crystal X-ray diffraction we have revealed the breaking of centrosymmetry when lowering the temperature under T = 200 K concomitantly with the setting of a c…
Mesoscopic tunneling in strontium titanate
Benoît Fauqué, Philippe Bourges, Alaska Subedi +6
Spatial correlation between atoms can generate a depletion in the energy dispersion of acoustic phonons. Two well known examples are rotons in superfluid helium and the Kohn anomal…
Pressure-induced structural phase transition and suppression of Jahn-Teller distortion in the quadruple perovskite structure
V. S. Bhadram, B. Joseph, D. Delmonte +5
By means of in situ synchrotron X-ray diffraction and Raman spectroscopy under hydrostatic pressure, we investigate the structural stability of the quadruple perovskite LaMn7O12. A…
Unconventional magnetic ferroelectricity in the quadruple perovskite NaMnO
Vinícius Pascotto Gastaldo, Yannick Klein, Benoît Baptiste +4
By means of magnetic, specific heat and pyroelectric measurements, we report on magnetic ferroelectricity in the quadruple perovskite \namno, characterized by a canted antiferromag…
Structural phase transition and bandgap control through mechanical deformation in layered semiconductors 1T-ZrX2 (X = S, Se)
Edoardo Martino, David Santos-Cottin, Florian Le Mardele +10
Applying elastic deformation can tune a material physical properties locally and reversibly. Spatially modulated lattice deformation can create a bandgap gradient, favouring photo-…
The crystal structure of Rb2Ti2O5
R. Federicci, B. Baptiste, F. Finocchi +9
Recent results have demonstrated an exceptionally high dielectric constant in the range 200 K-330 K in a crystalline tianium oxide : Rb2Ti2O5. In this article, the possibility of a…
$\mbox{Rb}_{2}\mbox{Ti}_2\mbox{O}_{5-δ}$: A superionic conductor with colossal dielectric constant
Rémi Federicci, Stéphane Holé, Aurelian Florin Popa +5
Electrical conductivity and high dielectric constant are in principle self-excluding, which makes the terms insulator and dielectric usually synonymous. This is certainly true when…