Causes of High-temperature Superconductivity in the Hydrogen Sulfide Electron-phonon System
| Autor: | Evgeny Mazur, N.N. Degtyarenko |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Superconductivity
High-temperature superconductivity Materials science Hydrogen Phonon superconductivity hydrogen sulfide phonon spectra chemistry.chemical_element Electron Physics and Astronomy(all) Molecular physics law.invention Crystal pressure Condensed Matter::Materials Science chemistry law Condensed Matter::Superconductivity Phase (matter) electron spectra Condensed Matter::Strongly Correlated Electrons Orthorhombic crystal system Physics::Atomic Physics |
| Zdroj: | Physics Procedia. 71:374-378 |
| ISSN: | 1875-3892 |
| DOI: | 10.1016/j.phpro.2015.08.364 |
| Popis: | The electron and phonon spectra, as well as the density of electron and phonon states of the stable orthorhombic structure of hydrogen sulfide (SH 2 ) at pressures 100-180 GPa have been calculated. It is found that the set of parallel planes of hydrogen atoms is formed at pressure ∼175 GPa as a result of structural changes in the unit cell of the crystal under pressure. There should be complete concentration of hydrogen atoms in these planes. As a result the electron properties of the system acquire a quasi-two-dimensional character. The features of in phase and antiphase oscillations of hydrogen atoms in these planes leading to two narrow high-energy peaks in the phonon density of states are investigated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|