Crystal Growth and Doping Control of HgBa2CuO4+{\delta}, the Model Compound for High-Tc Superconductors

A new method to grow very high quality single crystals of the superconducting HgBa2CuO4+{\delta} mercury cuprates is reported. The single crystals are platelet-shaped, with surfaces of high optical quality and good crystallographic properties. Annealing enables optimization of Tc up to Tcmax = 94 K....

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Bibliographic Details
Published in:arXiv.org 2018-12
Main Authors: Legros, Anaëlle, Bastien Loret, get, Anne, Bonnaillie, Patrick, Gaston, Collin, Thuéry, Pierre, Sacuto, Alain, Colson, Dorothée
Format: Article
Language:English
Subjects:
Crystal growth
Crystal structure
Crystallography
Cuprates
Doping
Gold
Optical properties
Raman spectroscopy
Single crystals
Structural analysis
X ray spectra
X-ray diffraction
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Summary:A new method to grow very high quality single crystals of the superconducting HgBa2CuO4+{\delta} mercury cuprates is reported. The single crystals are platelet-shaped, with surfaces of high optical quality and good crystallographic properties. Annealing enables optimization of Tc up to Tcmax = 94 K. With adequate treatment, the doping level of the crystalline samples can be finely controlled in a wide under- and over-doped range. Complete structural characterization from single crystal X-ray diffraction data is given for the first time for different doping levels. The role of added gold on the doping is also investigated. The signature of under- and over-doping for both pure and gold-substituted crystals has been identified from micro-Raman spectroscopy measurements.
ISSN:2331-8422