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Synthesis and Superconductivity of the Ternary Hydrides (Th,Y)H10
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Xiaoxu SONG1, 2, Xiaokuan HAO1, 2, Jingyu NIU1, 2, Guoying GAO1, 2, *, Yongjun TIAN1, 2
Chinese Journal of High Pressure Physics | 2026, 40(4) : 040104-1 - 040104-8
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Chinese Journal of High Pressure Physics | 2026, 40(4): 040104-1-040104-8
• Young Scientists’ Forum •
Synthesis and Superconductivity of the Ternary Hydrides (Th,Y)H10
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Xiaoxu SONG1, 2, Xiaokuan HAO1, 2, Jingyu NIU1, 2, Guoying GAO1, 2, *, Yongjun TIAN1, 2
Affiliations
  • 1State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066000, Hebei, China
  • 2School of Materials Science and Engineering, Yanshan University, Qinhuangdao 066000, Hebei, China
Published: 2026-04-05 doi: 10.11858/gywlxb.20251268
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Recent achieved superconductivity near room temperature, especially in hydrogen-based superconductors under high pressure, have attracted broad interest. However, most systems with high superconducting critical temperature (Tc) are only stable under extremely high pressures, which limits their practical applicability. This study proposes the possibility of obtaining high-Tc superconductors at moderate pressures within the ternary Th-Y-H system. The synthesis was carried out using Th, YH3, and NH3BH3 as precursors under high pressure and high temperature, applied by diamond anvil cells combined with in-situ laser heating technology. Combining with the synchrotron X-ray diffraction (XRD) measurements and theoretical studies, the main product was identified as Fm$ \overline{3} $m (Th,Y)H10, with Y accounting for approximately 10%−15%. Electrical transport measurements reveal that its Tc increases by approximately 10%, compared to ThH10 under similar pressure. At 144 GPa, the sample has a maximum Tc of 184 K, which remains at 170 K when decompressed to 100 GPa—approaching the highest level known for hydrides at this pressure. Measurements under an applied magnetic field further verify the superconductivity, with upper critical fields estimated at 52 and 39 T based on the WHH and GL models, respectively. These results indicate that the ternary Th-Y-H superconducting system is an outstanding candidate for high-Tc superconductors, and the crystal stability and electronic properties can be effectively controlled by reasonably introducing new element into the binary system. This work provides new insights and experimental evidences for exploring high-Tc superconducting hydrides under moderate or even low pressures.

ternary hydrides  /  superconductivity  /  Th-Y-H system  /  high pressure  /  superconducting critical temperature
Xiaoxu SONG, Xiaokuan HAO, Jingyu NIU, Guoying GAO, Yongjun TIAN. Synthesis and Superconductivity of the Ternary Hydrides (Th,Y)H10[J]. Chinese Journal of High Pressure Physics, 2026 , 40 (4) : 040104-1 -040104-8 . DOI: 10.11858/gywlxb.20251268
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Year 2026 volume 40 Issue 4
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Article Info
doi: 10.11858/gywlxb.20251268
  • Receive Date：2025-11-26
  • Online Date：2026-04-29
  • Published：2026-04-05
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  • Received：2025-11-26
  • Revised：2025-12-28
Affiliations
    1State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066000, Hebei, China
    2School of Materials Science and Engineering, Yanshan University, Qinhuangdao 066000, Hebei, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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