Pressure-Induced Metallization and Novel Superconductivity of Chalcogen Hydrides

SUN Ying; ZHONG Xin; LÜ Jian; MA Yanming

doi:10.11858/gywlxb.20170629

Volume 32 Issue 1

Dec 2017

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Chinese Journal of High Pressure Physics > 2018 > 32(1): 010102.

SUN Ying, ZHONG Xin, LÜ Jian, MA Yanming. Pressure-Induced Metallization and Novel Superconductivity of Chalcogen Hydrides[J]. Chinese Journal of High Pressure Physics, 2018, 32(1): 010102. doi: 10.11858/gywlxb.20170629

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SUN Ying, ZHONG Xin, LÜ Jian, MA Yanming. Pressure-Induced Metallization and Novel Superconductivity of Chalcogen Hydrides[J]. Chinese Journal of High Pressure Physics, 2018, 32(1): 010102. doi: 10.11858/gywlxb.20170629

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Pressure-Induced Metallization and Novel Superconductivity of Chalcogen Hydrides

doi: 10.11858/gywlxb.20170629

SUN Ying^1
,,
ZHONG Xin^{1, 2},
LÜ Jian^{1,*
,
,},
MA Yanming¹

1.
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
2.
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China

Received Date: 11 Aug 2017
Rev Recd Date: 01 Sep 2017

Abstract

Abstract

Owing to their expected capability to reach metallization within the pressure range under the present laboratory conditions, hydrogen-rich compounds are considered promising candidates for potential high-T_c (superconductor critical temperature) superconductors.Both experimental and theoretical research have found that the critical high-temperature superconductivity can reach a record high-T_c as up to 203 K in compressed sulfur hydrides, thereby generating a new wave for searching for new hydrogen-rich superconductors.The present review focuses on researches of pressure-induced metallization and novel superconductivity in chalcogen hydrides, and discusses their differences in structures and various physical and chemical properties.Chalcogen atoms are isoelectronic but differ a lot in atomic mass and electronegativity, resulting in their great differences in stoichiometry, structure, and chemical bonding.The high-T_c superconductivity of Te/Po-H compounds originates from the strong electron-phonon couplings associated with the intermediate frequency of H-derived wagging and bending modes, a superconducting mechanism which differs substantially from those in S/Se-H compounds where the high frequency H-stretching vibrations make considerable contributions.
- high pressure,
- chalcogen hydrides,
- crystal structure,
- superconductivity

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References

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Pressure-Induced Metallization and Novel Superconductivity of Chalcogen Hydrides

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