A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent
The high value of the isotope shift in sulfur hydrides supports a phonon-mediated pairing scenario of superconductivity for these high-temperature superconductors which are consistent with the Bardeen–Cooper–Schrieffer (BCS) framework. Knowing that a large electronic density of states enhances the c...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2019/6795250 |
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| _version_ | 1832556614967623680 |
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| author | R. M. Méndez-Moreno |
| author_facet | R. M. Méndez-Moreno |
| author_sort | R. M. Méndez-Moreno |
| collection | DOAJ |
| description | The high value of the isotope shift in sulfur hydrides supports a phonon-mediated pairing scenario of superconductivity for these high-temperature superconductors which are consistent with the Bardeen–Cooper–Schrieffer (BCS) framework. Knowing that a large electronic density of states enhances the critical temperature (Tc), generalized Fermi surface topologies are used to increase it. A multicomponent model within the BCS framework is proposed in this work for sulfur hydride superconductors. This model is used to evaluate some properties of the H3S superconductor. Strong and intermediate coupling effects are taken into account with the effective McMillan approximation, and the isotope coefficient is evaluated as a function of the coupling parameter as well as other relevant parameters of the model. |
| format | Article |
| id | doaj-art-720378db8bb443a49fca012ee16d17ce |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-720378db8bb443a49fca012ee16d17ce2025-02-03T05:44:50ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242019-01-01201910.1155/2019/67952506795250A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass ExponentR. M. Méndez-Moreno0Departamento de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad de México 04510, MexicoThe high value of the isotope shift in sulfur hydrides supports a phonon-mediated pairing scenario of superconductivity for these high-temperature superconductors which are consistent with the Bardeen–Cooper–Schrieffer (BCS) framework. Knowing that a large electronic density of states enhances the critical temperature (Tc), generalized Fermi surface topologies are used to increase it. A multicomponent model within the BCS framework is proposed in this work for sulfur hydride superconductors. This model is used to evaluate some properties of the H3S superconductor. Strong and intermediate coupling effects are taken into account with the effective McMillan approximation, and the isotope coefficient is evaluated as a function of the coupling parameter as well as other relevant parameters of the model.http://dx.doi.org/10.1155/2019/6795250 |
| spellingShingle | R. M. Méndez-Moreno A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent Advances in Condensed Matter Physics |
| title | A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent |
| title_full | A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent |
| title_fullStr | A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent |
| title_full_unstemmed | A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent |
| title_short | A Schematic Two Overlapping-Band Model for Superconducting Sulfur Hydrides: The Isotope Mass Exponent |
| title_sort | schematic two overlapping band model for superconducting sulfur hydrides the isotope mass exponent |
| url | http://dx.doi.org/10.1155/2019/6795250 |
| work_keys_str_mv | AT rmmendezmoreno aschematictwooverlappingbandmodelforsuperconductingsulfurhydridestheisotopemassexponent AT rmmendezmoreno schematictwooverlappingbandmodelforsuperconductingsulfurhydridestheisotopemassexponent |