Gérard Hamel
Pierre-and-Marie-Curie University
72 Papers
698 Citations
Gérard Hamel is an academic researcher from Pierre-and-Marie-Curie University. The author has contributed to research in topics: Neutron diffraction & Neutron scattering. The author has an hindex of 31, co-authored 72 publications. Previous affiliations of Gérard Hamel include University of Paris & Centre national de la recherche scientifique.
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Papers
4-spin plaquette singlet state in the Shastry-Sutherland compound SrCu2(BO3)(2)
M. E. Zayed,M. E. Zayed,M. E. Zayed,Ch. Rüegg,Ch. Rüegg,Ch. Rüegg,J. Larrea J.,Andreas M. Läuchli,Christos Panagopoulos,Christos Panagopoulos,Siddharth S. Saxena,M. Ellerby,D. F. McMorrow,Th. Strässle,Stefan Klotz,Gérard Hamel,Ravil A. Sadykov,Vladimir Pomjakushin,Martin Boehm,M. Jiménez–Ruiz,A. Schneidewind,Ekaterina Pomjakushina,M. Stingaciu,Kazimierz Conder,Henrik M. Rønnow +24 more
TL;DR: A detailed neutron scattering study of the Shastry-Sutherland material SrCu2(BO3)2 verifies the existence of a 4-spin plaquette singlet phase in this system.
155
Neutron diffraction study of the structure of deuterated ice VIII to 10 GPa.
R. J. Nelmes,John Loveday,R. M. Wilson,J. M. Besson,Ph. Pruzan,Stefan Klotz,Gérard Hamel,Stephen Hull +7 more
TL;DR: The pressure dependence of the structure of deuterated ice VIII has been studied by time-of-flight neutron powder diffraction up to 10 GPa and it appears that the form of the O-H potential is constant with pressure.
105
Observation of inverted-molecular compression in boron carbide.
R. J. Nelmes,John Loveday,R. M. Wilson,William G. Marshall,J. M. Besson,Stefan Klotz,Gérard Hamel,T. L. Aselage,Steve Hull +8 more
TL;DR: High-pressure neutron diffraction studies of boron carbide show that the icosahedral structural units are 23(4)% more compressible than the structure between them, showing the effect of the structural compression on the electrical resistivity to be more complex than present, semiquantitative models suggest.
95
Structure of high-density amorphous ice under pressure.
TL;DR: In situ neutron diffraction studies of high-density amorphous ice at 100 K at pressures up to 2.2 GPa suggest that HDA has increasingly interpenetrating hydrogen bond networks under pressure.
94
Metastable ice VII at low temperature and ambient pressure
TL;DR: In this paper, it was shown that isothermal compression of D2O ice VI below 95 K produces pure ice VII, and that this phase can remain stable at atmospheric pressure.
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