%0 Journal Article %T Elastic Constants, Optical Phonons, and Molecular Relaxations in the High Temperature Plastic Phase of the CH3NH3PbBr3 Hybrid Perovskite. %+ Fonctions Optiques pour les Technologies de l'informatiON (FOTON) %+ Institut des Sciences Chimiques de Rennes (ISCR) %+ Laboratoire Charles Coulomb (L2C) %+ Laboratoire Léon Brillouin (LLB - UMR 12) %+ Institut de Physique de Rennes (IPR) %A Létoublon, Antoine %A Paofai, Serge %A Ruffle, Benoit %A Bourges, Philippe %A Hehlen, Bernard %A Michel, Thierry %A Ecolivet, Claude %A Durand, Olivier %A Cordier, Stéphane %A Katan, Claudine %A Even, Jacky %Z A.L. thanks T. Roisnel %Z CDIFX %Z and V. Demange %Z CSM %Z at Institut des Sciences Chimiques de Rennes %Z for X-ray diffraction characterization of the samples. T.M. acknowledges financial support from University of Montpellier “Soutien a la recherche” grant. %< avec comité de lecture %Z L2C:16-124 %@ 1948-7185 %J Journal of Physical Chemistry Letters %I American Chemical Society %V 7 %N 19 %P 3776-3784 %8 2016-10-06 %D 2016 %R 10.1021/acs.jpclett.6b01709 %M 27601100 %Z Physics [physics] %Z Engineering Sciences [physics] %Z Chemical SciencesJournal articles %G English %2 https://hal.science/hal-01362483/document %2 https://hal.science/hal-01362483/file/JPCLett_Neutrons_ACSAuthorChoice.pdf %L hal-01362483 %U https://hal.science/hal-01362483 %~ CEA %~ INSTITUT-TELECOM %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ ENSC-RENNES %~ FOTON %~ FOTON-INSA %~ OSUR %~ OPENAIRE %~ L2C %~ ISCR %~ IPR %~ FOTON_OHM %~ ISCR-CTI %~ ISCR-CSM %~ ZZ-IPR-MN %~ UR1-SPM %~ INC-CNRS %~ IRAMIS-LLB %~ CEA-UPSAY %~ UR1-UFR-SPM %~ UR1-HAL %~ UR1-MATH-STIC %~ UR1-SDLM %~ UNIV-PARIS-SACLAY %~ CEA-UPSAY-SACLAY %~ IPR-ML %~ MIPS %~ UNIV-MONTPELLIER %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ INSTITUTS-TELECOM %~ ANR %~ UR1-MATH-NUM %~ UR1-MMS %~ GS-ENGINEERING %~ IRAMIS %~ GS-CHIMIE %~ GS-PHYSIQUE %~ UM-2015-2021 %~ TEST2-HALCNRS