Crystal Growth and Characterization of HgBa2Ca2Cu3O8+δ Superconductor with the Highest Critical Temperature at Ambient Pressure

Bastien Loret 1, 2 Anne Forget 2 Jean-Baptiste Moussy 2 Sylvie Poissonnet 3 Patrick Bonnaillie 3 Gaston Collin 4 Pierre Thuéry 5 Alain Sacuto 1 Dorothée Colson 2
2 LNO - Laboratoire Nano-Magnétisme et Oxydes
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
3 SRMP - Service de recherches de métallurgie physique
DMN - Département des Matériaux pour le Nucléaire : DEN/DMN
5 LCMCE - Laboratoire de Chimie Moléculaire et de Catalyse pour l'Energie (ex LCCEF)
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : We report an original procedure for the elaboration of very high quality single crystals of superconducting HgBa2Ca2Cu3O8+δ mercury cuprates. These single crystals are unique with very high quality surface paving the way for spectroscopic, transport and thermodynamic probes in order to understand the hole-doped cuprate phase diagram. The superconductivity transition width of about 2 K indicates they are homogeneous. Annealing allows to optimize Tc up to Tc max = 133 K. We show for the first time that with adequate heat treatment, Hg-1223 can be largely under-doped and its doping level controlled. Importantly, the crystal structure was studied in detail by single crystal X-ray diffraction, and we have identified the signature of the under-doping by a detailed sample characterization and micro-Raman spectroscopy measurements.
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Bastien Loret, Anne Forget, Jean-Baptiste Moussy, Sylvie Poissonnet, Patrick Bonnaillie, et al.. Crystal Growth and Characterization of HgBa2Ca2Cu3O8+δ Superconductor with the Highest Critical Temperature at Ambient Pressure. Inorganic Chemistry, American Chemical Society, 2017, 56, pp.9396-9399. ⟨http://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.7b01372⟩. ⟨10.1021/acs.inorgchem.7b01372⟩. ⟨cea-01573932⟩

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