تقرير
Superconductivity Observed in Tantalum Polyhydride at High Pressure
| العنوان: | Superconductivity Observed in Tantalum Polyhydride at High Pressure |
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| المؤلفون: | He, X., Zhang, C. L., Li, Z. W., Zhang, S. J., Min, B. S., Zhang, J., Lu, K., Zhao, J. F., Shi, L. C., Peng, Y., Wang, X. C., Feng, S. M., Song, J., Wang, L. H., Prakapenka, V. B., Chariton, S., Liu, H. Z., Jin, C. Q. |
| المصدر: | Chinese Physics Letters 40, 057404 (2023) (Express Letter) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Materials Science |
| الوصف: | We report experimental discovery of tantalum polyhydride superconductor. It was synthesized at high pressure and high temperature conditions using diamond anvil cell combined with in-situ high pressure laser heating techniques. The superconductivity was investigated via resistance measurements at pressures. The highest superconducting transition temperature Tc was found to be ~30 K at 197 GPa in the sample that was synthesized at the same pressure with ~2000 K heating. The transitions are shifted to low temperature upon applying magnetic fields that supports the superconductivity nature. The upper critical field at zero temperature {\mu}0Hc2(0) of the superconducting phase is estimated to be ~20 T that corresponds to GL coherent length ~40 angstroms. Our results suggest that the superconductivity may arise from I-43d phase of TaH3. It is, for the first time to our best knowledge, experimental realization of superconducting hydrides for the VB group of transitional metals. Comment: Published by CPL |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0256-307X/40/5/057404 |
| URL الوصول: | http://arxiv.org/abs/2212.13739 |
| رقم الأكسشن: | edsarx.2212.13739 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0256-307X/40/5/057404 |
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