تقرير
Bulk superconductivity at 84 K in the strongly overdoped regime of cuprates
| العنوان: | Bulk superconductivity at 84 K in the strongly overdoped regime of cuprates |
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| المؤلفون: | Gauzzi, A., Klein, Y., Nisula, M., Karppinen, M., Biswas, P. K., Saadaoui, H., Morenzoni, E., Manuel, P., Khalyavin, D., Marezio, M., Geballe, T. H. |
| المصدر: | Physical Review B 94, 180509(R) (2016) |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | By means of magnetization, specific heat and muon-spin relaxation measurements, we investigate high-pressure oxidized \mohpo, in which overdoping is achieved up to $p \sim 0.45$ hole/Cu, well beyond the $T_c - p$ superconducting dome of cuprates, where Fermi liquid behavior is expected. Surprisingly, we find bulk superconductivity with $T_c$=84 K and superfluid density similar to those of optimally doped Y123. On the other hand, specific heat data display a large electronic contribution at low temperature, comparable to that of nonsuperconducting overdoped La214. These results point at an unusual high-$T_c$ phase with a large fraction of unpaired holes. Further experiments may assess the Fermi liquid properties of the present phase, which would put into question the paradigm that the high $T_c$ of cuprates originates from a non-Fermi liquid ground state. Comment: 5 pages, 5 Figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.94.180509 |
| URL الوصول: | http://arxiv.org/abs/1612.04707 |
| رقم الأكسشن: | edsarx.1612.04707 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.94.180509 |
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