Evidence for Clean d-wave Superconductivity in Samarium Nickelates
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_ | 1866909975306043392 |
|---|---|
| author | Huang, Qingming Fu, Xiaofang Wu, Junlong Li, Laifeng Qiao, Liang Yang, Ye |
| author_facet | Huang, Qingming Fu, Xiaofang Wu, Junlong Li, Laifeng Qiao, Liang Yang, Ye |
| contents | The discovery of superconducting nickelates provides a unique opportunity to explore the pairing mechanism of high-temperature superconductivity. Here, we use ultrafast terahertz spectroscopy to probe the temperature-dependent superfluid density in an infinite-layer samarium nickelate film with a Tc of 20 K. The superfluid density decreases linearly with rising temperature, consistent with clean limit d-wave pairing. From this linear relation, we extract a superconducting gap of 2.5 meV and a gap-to-Tc ratio of 3, suggesting that this sample lies in the weak-coupling limit. Furthermore, the ratio of the mean free path to the coherence length, is determined to be 1.5, confirming the clean-limit behavior. These findings establish strong parallels between the pairing mechanisms in nickelate and cuprate superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_20928 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Evidence for Clean d-wave Superconductivity in Samarium Nickelates Huang, Qingming Fu, Xiaofang Wu, Junlong Li, Laifeng Qiao, Liang Yang, Ye Superconductivity The discovery of superconducting nickelates provides a unique opportunity to explore the pairing mechanism of high-temperature superconductivity. Here, we use ultrafast terahertz spectroscopy to probe the temperature-dependent superfluid density in an infinite-layer samarium nickelate film with a Tc of 20 K. The superfluid density decreases linearly with rising temperature, consistent with clean limit d-wave pairing. From this linear relation, we extract a superconducting gap of 2.5 meV and a gap-to-Tc ratio of 3, suggesting that this sample lies in the weak-coupling limit. Furthermore, the ratio of the mean free path to the coherence length, is determined to be 1.5, confirming the clean-limit behavior. These findings establish strong parallels between the pairing mechanisms in nickelate and cuprate superconductors. |
| title | Evidence for Clean d-wave Superconductivity in Samarium Nickelates |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2512.20928 |