1. Crystal Growth and Doping Control of HgBa2CuO4+{\delta}, the Model Compound for High-Tc Superconductors
- Author
-
Legros, Anaëlle, Loret, Bastien, Forget, Anne, Bonnaillie, Patrick, Collin, Gaston, Thuéry, Pierre, Sacuto, Alain, and Colson, Dorothée
- Subjects
Condensed Matter - Superconductivity - 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., Comment: 9 pages,6 figures, 3 tables
- Published
- 2018