High temperature superconductivity in sulfur and selenium hydrides at high pressure

By J. A. Flores-Livas, A. Sanna, Eberhard K. U. Gross. European Physical Journal B : Condensed Matter Physics, 2015

181 citations recorded by the source corpus.

Due to its low atomic mass, hydrogen is the most promising element to search for high-temperature phononic superconductors. However, metallic phases of hydrogen are only expected at extreme pressures (400 GPa or higher). The measurement of the record superconducting critical temperature of 203 K in a hydrogen-sulfur compound at 160 GPa of pressure [A.P. Drozdov, M.I. Eremets, I.A. Troyan, arXiv:1412.0460 [cond-mat.supr-con] (2014); A.P. Drozdov, M.I. Eremets, I.A. Troyan, V. Ksenofontov, S.I. Shylin, Nature 525, 73 (2015)], shows that metallization of hydrogen can be reached at significantly lower pressure by inserting it in the matrix of other elements. In this work we investigate the phase diagram and the superconducting properties of the H-S systems by means of minima hopping method for structure prediction and density functional theory for superconductors. We also show that Se-H has a similar phase diagram as its sulfur counterpart as well as high superconducting critical temperature. We predict H3Se to exceed 120 K superconductivity at 100 GPa. We show that both H3Se and H3S, due to the critical temperature and peculiar electronic structure, present rather unusual superconducting properties.

Subfields: Atomic and Molecular Physics, and Optics, Geophysics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/8ffd1aafc5ca36104a92e6fb12a0e79531df124b

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In Atomic and Molecular Physics, and Optics

1. J. A. Flores-Livas
2. Ryotaro Arita
3. M. Eremets
4. G. Profeta
5. A. Sanna
6. L. Boeri

In Geophysics

1. J. A. Flores-Livas
2. Ryotaro Arita
3. M. Eremets
4. G. Profeta
5. A. Sanna
6. L. Boeri

In Materials Chemistry

1. J. A. Flores-Livas
2. G. Profeta
3. A. Sanna

Citations in the corpus

• A perspective on conventional high-temperature superconductors at high pressure: Methods and materials (2019, background): “This version of SCDFT has been extremely successful in predicting superconductivity in a wide variety of materials [253, 254] and proved especially useful for the investigation of superconductivity in high pressure environments [173].”