Magnetic bound states embedded in tantalum superconducting thin films
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908314396262400 |
|---|---|
| author | Arabi, Soroush Li, Qili Dhundhwal, Ritika Fuchs, Dirk Reisinger, Thomas Pop, Ioan M. Wulfhekel, Wulf |
| author_facet | Arabi, Soroush Li, Qili Dhundhwal, Ritika Fuchs, Dirk Reisinger, Thomas Pop, Ioan M. Wulfhekel, Wulf |
| contents | In the fabrication of superconducting devices, both in situ and ex situ processes are utilized, making the removal of unwanted oxide layers and impurities under vacuum conditions crucial. Oxygen descumming and argon milling are standard in situ cleaning methods employed for device preparation. We investigated the impact of these techniques on tantalum superconducting thin films using scanning tunneling microscopy at millikelvin temperatures. We demonstrate that these cleaning methods inadvertently introduce magnetic bound states within the superconducting gap of tantalum, likely by oxygen impurities. These bound states can be detrimental to superconducting qubit devices, as they add to dephasing and energy relaxation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_15903 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Magnetic bound states embedded in tantalum superconducting thin films Arabi, Soroush Li, Qili Dhundhwal, Ritika Fuchs, Dirk Reisinger, Thomas Pop, Ioan M. Wulfhekel, Wulf Superconductivity In the fabrication of superconducting devices, both in situ and ex situ processes are utilized, making the removal of unwanted oxide layers and impurities under vacuum conditions crucial. Oxygen descumming and argon milling are standard in situ cleaning methods employed for device preparation. We investigated the impact of these techniques on tantalum superconducting thin films using scanning tunneling microscopy at millikelvin temperatures. We demonstrate that these cleaning methods inadvertently introduce magnetic bound states within the superconducting gap of tantalum, likely by oxygen impurities. These bound states can be detrimental to superconducting qubit devices, as they add to dephasing and energy relaxation. |
| title | Magnetic bound states embedded in tantalum superconducting thin films |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2412.15903 |