Materials Today, volume 33, pages 36-44
Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties
A. R. Oganov
1, 2, 3
,
Alexander G. Kvashnin
1, 3
,
A.V. Sadakov
6
,
Anna G. Ivanova
,
Anna Ivanova
7
,
Vladimir M. Pudalov
6
,
Ivan A. Troyan
7
Publication type: Journal Article
Publication date: 2020-03-01
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Here we report targeted high-pressure synthesis of two novel high-$T_C$ hydride superconductors, $P6_3/mmc$-$ThH_9$ and $Fm\bar{3}m$-$ThH_{10}$, with the experimental critical temperatures ($T_C$) of 146 K and 159-161 K and upper critical magnetic fields ($\mu$$H_C$) 38 and 45 Tesla at pressures 170-175 Gigapascals, respectively. Superconductivity was evidenced by the observation of zero resistance and a decrease of $T_C$ under external magnetic field up to 16 Tesla. This is one of the highest critical temperatures that has been achieved experimentally in any compounds, along with such materials as $LaH_{10}$, $H_3S$ and $HgBa_2Ca_xCu_2O_{6+z}$. Our experiments show that $fcc$-$ThH_{10}$ has stabilization pressure of 85 GPa, making this material unique among all known high-$T_C$ metal polyhydrides. Two recently predicted Th-H compounds, $I4/mmm$-$ThH_4$ (> 86 GPa) and $Cmc2_1$-$ThH_6$ (86-104 GPa), were also synthesized. Equations of state of obtained thorium polyhydrides were measured and found to perfectly agree with the theoretical calculations. New phases were examined theoretically and their electronic, phonon, and superconducting properties were calculated.
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Semenok D. V. et al. Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties // Materials Today. 2020. Vol. 33. pp. 36-44.
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Semenok D. V., Kvashnin A. G., Svitlyk V., Fominski V. Yu., Sadakov A., Sobolevskiy O. A., Pudalov V., Troyan I. A., Oganov A. R., Ivanova A. G., Ivanova A., Pudalov V. M., Troyan I. A. Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties // Materials Today. 2020. Vol. 33. pp. 36-44.
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TY - JOUR
DO - 10.1016/j.mattod.2019.10.005
UR - https://doi.org/10.1016/j.mattod.2019.10.005
TI - Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties
T2 - Materials Today
AU - Semenok, Dmitry V.
AU - Kvashnin, Alexander G.
AU - Svitlyk, Volodymyr
AU - Fominski, Vyacheslav Yu
AU - Sadakov, A.V.
AU - Sobolevskiy, O. A.
AU - Pudalov, V.M.
AU - Troyan, I. A.
AU - Oganov, A. R.
AU - Ivanova, Anna G.
AU - Ivanova, Anna
AU - Pudalov, Vladimir M.
AU - Troyan, Ivan A.
PY - 2020
DA - 2020/03/01 00:00:00
PB - Elsevier
SP - 36-44
VL - 33
SN - 1369-7021
ER -
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@article{2020_Semenok,
author = {Dmitry V. Semenok and Alexander G. Kvashnin and Volodymyr Svitlyk and Vyacheslav Yu Fominski and A.V. Sadakov and O. A. Sobolevskiy and V.M. Pudalov and I. A. Troyan and A. R. Oganov and Anna G. Ivanova and Anna Ivanova and Vladimir M. Pudalov and Ivan A. Troyan},
title = {Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties},
journal = {Materials Today},
year = {2020},
volume = {33},
publisher = {Elsevier},
month = {mar},
url = {https://doi.org/10.1016/j.mattod.2019.10.005},
pages = {36--44},
doi = {10.1016/j.mattod.2019.10.005}
}