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arXiv · 1808.00228

Crystal Growth and Characterization of HgBa2Ca2Cu3O8+{\delta} Superconductor with the Highest Critical Temperature at Ambient Pressure

Bastien Loret·Anne Forget·Jean-Baptiste Moussy·Sylvie Poissonnet·Patrick Bonnaillie·Gaston Collin·Pierre Thuéry·Alain Sacuto·Dorothée Colson
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Abstract

We report an original procedure for the elaboration of very high quality single crystals of superconducting HgBa2Ca2Cu3O8+{\delta} 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, Gaston Collin, Pierre Thuéry, Alain Sacuto, Dorothée Colson. 2018-08-01. Crystal Growth and Characterization of HgBa2Ca2Cu3O8+{\delta} Superconductor with the Highest Critical Temperature at Ambient Pressure. https://arxiv.org/abs/1808.00228

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