Multi-Gap superconductivity in HgS under pressure
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912512940703744 |
|---|---|
| author | Forcella, Pietro Maria Tresca, Cesare Sanna, Antonio Profeta, Gianni |
| author_facet | Forcella, Pietro Maria Tresca, Cesare Sanna, Antonio Profeta, Gianni |
| contents | Mercury chalcogenides is a class of materials that exhibit diverse structural phases under pressure, hosting exotic physical properties, including topological phases and chiral phonons. In particular, recent experimental results on HgS reports a new superconducting phase at 21 GPa, whose origin is unknown. In this letter we theoretically investigate the pressure-induced structural phase transition in HgS and the emergence of superconductivity in the rock salt phase. Remarkably, we discover that the rock salt phase hosts a two-gap superconducting phase originating from distinct Fermi surfaces. The unusually high critical temperature of 11 K emerges naturally within this multiband scenario, highlighting the role of interband coupling beyond isotropic approximation. These results place HgS among the few systems where multiband superconductivity is observed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_21869 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multi-Gap superconductivity in HgS under pressure Forcella, Pietro Maria Tresca, Cesare Sanna, Antonio Profeta, Gianni Superconductivity Materials Science Quantum Physics Mercury chalcogenides is a class of materials that exhibit diverse structural phases under pressure, hosting exotic physical properties, including topological phases and chiral phonons. In particular, recent experimental results on HgS reports a new superconducting phase at 21 GPa, whose origin is unknown. In this letter we theoretically investigate the pressure-induced structural phase transition in HgS and the emergence of superconductivity in the rock salt phase. Remarkably, we discover that the rock salt phase hosts a two-gap superconducting phase originating from distinct Fermi surfaces. The unusually high critical temperature of 11 K emerges naturally within this multiband scenario, highlighting the role of interband coupling beyond isotropic approximation. These results place HgS among the few systems where multiband superconductivity is observed. |
| title | Multi-Gap superconductivity in HgS under pressure |
| topic | Superconductivity Materials Science Quantum Physics |
| url | https://arxiv.org/abs/2507.21869 |