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Crystal Growth and Characterization of HgBa2Ca2Cu3O8+et948; Superconductors with the Highest Critical Temperature at Ambient Pressure

Abstract : We report an original procedure for theelaboration of very high-quality single crystals of superconductingHgBa2Ca2Cu3O8+et948; mercury cuprates. Thesesingle crystals are unique, with very high-quality surfacepaving the way for spectroscopic, transport, andthermodynamic probes in order to understand the holedopedcuprate phase diagram. Annealing allows one tooptimize Tc up to Tcmax = 133 K. The superconductivitytransition width of about 2 K indicates that they arehomogeneous. We show for the first time that, withadequate heat treatment, Hg-1223 can be largely underdopedand its doping level controlled. Importantly, thecrystal structure was studied in detail by single-crystal Xraydiffraction, and we have identified the signature of theunderdoping by a detailed sample characterization andmicro-Raman spectroscopy measurements.
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https://hal-cea.archives-ouvertes.fr/cea-02339915
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Submitted on : Wednesday, October 30, 2019 - 3:44:26 PM
Last modification on : Wednesday, September 16, 2020 - 4:39:35 PM

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B. Loret, A. Forget, J.-B. Moussy, S. Poissonnet, P. Bonnaillie, et al.. Crystal Growth and Characterization of HgBa2Ca2Cu3O8+et948; Superconductors with the Highest Critical Temperature at Ambient Pressure. Inorganic Chemistry Communications, Elsevier, 2017, 56, ⟨10.1021/acs.inorgchem.7b01372⟩. ⟨cea-02339915⟩

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