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

Anaëlle Legros; Bastien Loret; Anne Forget; Patrick Bonnaillie; Gaston Collin; Pierre Thuéry; Alain Sacuto; Dorothée Colson

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

Superconductivity 2018-12-07 v3

Authors: Anaëlle Legros , Bastien Loret , Anne Forget , Patrick Bonnaillie , Gaston Collin , Pierre Thuéry , Alain Sacuto , Dorothée Colson

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Abstract

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.

Keywords

hgba2cuo4+delta single crystal growth doping control high-tc superconductors x-ray diffraction micro-raman spectroscopy

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@article{arxiv.1812.01489,
  title  = {Crystal Growth and Doping Control of HgBa2CuO4+{\delta}, the Model Compound for High-Tc Superconductors},
  author = {Anaëlle Legros and Bastien Loret and Anne Forget and Patrick Bonnaillie and Gaston Collin and Pierre Thuéry and Alain Sacuto and Dorothée Colson},
  journal= {arXiv preprint arXiv:1812.01489},
  year   = {2018}
}

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9 pages,6 figures, 3 tables

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

Abstract

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