Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties

Semenok D.V., Kvashnin A.G., Ivanova A.G., Svitlyk V., Fominski V.Y., Sadakov A.V., Sobolevskiy O.A., Pudalov V.M., Troyan I.A., Oganov A.R.
Тип документа: Journal Article
Дата публикации: 2020-03-19
Название журнала: Materials Today
Издатель: Elsevier
Квартиль: Q1
ISSN: 13697021
DOI:  10.1016/j.mattod.2019.10.005
  • Condensed Matter Physics
  • General Materials Science
  • Mechanical Engineering
  • Mechanics of Materials
Краткое описание
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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1. Semenok D. V. и др. Superconductivity at 161 K in thorium hydride ThH10: Synthesis and properties // Materials Today. 2020. Т. 33. С. 36–44.
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TY - JOUR

DO - 10.1016/j.mattod.2019.10.005

UR - http://dx.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 - Ivanova, Anna G.

AU - Svitlyk, Volodymyr

AU - Fominski, Vyacheslav Yu.

AU - Sadakov, Andrey V.

AU - Sobolevskiy, Oleg A.

AU - Pudalov, Vladimir M.

AU - Troyan, Ivan A.

AU - Oganov, Artem R.

PY - 2020

DA - 2020/03

PB - Elsevier BV

SP - 36-44

VL - 33

SN - 1369-7021

ER -

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@article{Semenok_2020,

doi = {10.1016/j.mattod.2019.10.005},

url = {https://doi.org/10.1016%2Fj.mattod.2019.10.005},

year = 2020,

month = {mar},

publisher = {Elsevier {BV}},

volume = {33},

pages = {36--44},

author = {Dmitry V. Semenok and Alexander G. Kvashnin and Anna G. Ivanova and Volodymyr Svitlyk and Vyacheslav Yu. Fominski and Andrey V. Sadakov and Oleg A. Sobolevskiy and Vladimir M. Pudalov and Ivan A. Troyan and Artem R. Oganov},

title = {Superconductivity at 161 K in thorium hydride {ThH}10: Synthesis and properties},

journal = {Materials Today}

}

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Semenok, Dmitry V., et al. “Superconductivity at 161 K in Thorium Hydride ThH10: Synthesis and Properties.” Materials Today, vol. 33, Mar. 2020, pp. 36–44. Crossref, https://doi.org/10.1016/j.mattod.2019.10.005.