Pressure-induced order-disorder phase transition in superconducting CaC6

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dc.creatorGauzzi, A.
dc.creatorBendiab, N.
dc.creatord'Astuto, M.
dc.creatorCanny, B.
dc.creatorCalandra, M.
dc.creatorMauri, F.
dc.creatorLoupias, G.
dc.creatorEmery, N.
dc.creatorHerold, C.
dc.creatorLagrange, P.
dc.creatorHanfland, M.
dc.creatorMezouar, M.
dc.date2008-02-22
dc.date.accessioned2026-07-07T09:22:45Z
dc.date.available2026-07-07T09:22:45Z
dc.descriptionBy means of synchrotron X-ray diffraction, we studied the effect of high pressure, P, up to 13 GPa on the room temperature crystal structure of superconducting CaC6. In this P range, no change of the pristine space group symmetry, \textit{R\=3m}, is found. However, at 9 GPa, i.e. close to the critical value at which a large T_c reduction was reported recently, we observed a compressibility jump concomitant to a large broadening of Bragg peaks. The reversibility of both effects upon depressurization and symmetry arguments give evidence of an order-disorder phase transition of second order, presumably associated with the Ca sublattice, which provides a full account for the above Tc reduction.
dc.description9 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0802.3273
dc.identifierhttp://arxiv.org/abs/0802.3273
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155486
dc.subjectSuperconductivity
dc.subjectMaterials Science
dc.titlePressure-induced order-disorder phase transition in superconducting CaC6
dc.typetext

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