Identifying impurities in a silicon substrate by using a superconducting flux qubit
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929393904910336 |
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| author | Toida, Hiraku Kakuyanagi, Kosuke Abdurakhimov, Leonid V. Hori, Masahiro Ono, Yukinori Saito, Shiro |
| author_facet | Toida, Hiraku Kakuyanagi, Kosuke Abdurakhimov, Leonid V. Hori, Masahiro Ono, Yukinori Saito, Shiro |
| contents | A bismuth-doped silicon substrate was analyzed by using a magnetometer based on a superconducting flux qubit. The temperature dependence of the magnetization indicates that the silicon substrate contains at least two signal sources, intentionally doped bismuth spins and a spin 1/2 system with a ratio of 0.873 to 0.127. In combination with a conventional electron spin resonance spectrometer, a candidate origin of the spin 1/2 system was identified as a dangling bond on the silicon surface. In addition, the spin sensitivity of the magnetometer was also estimated to be 12 spins/$\sqrt{\mathrm{Hz}}$ by using optimized dispersive readout. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_14948 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Identifying impurities in a silicon substrate by using a superconducting flux qubit Toida, Hiraku Kakuyanagi, Kosuke Abdurakhimov, Leonid V. Hori, Masahiro Ono, Yukinori Saito, Shiro Quantum Physics Superconductivity A bismuth-doped silicon substrate was analyzed by using a magnetometer based on a superconducting flux qubit. The temperature dependence of the magnetization indicates that the silicon substrate contains at least two signal sources, intentionally doped bismuth spins and a spin 1/2 system with a ratio of 0.873 to 0.127. In combination with a conventional electron spin resonance spectrometer, a candidate origin of the spin 1/2 system was identified as a dangling bond on the silicon surface. In addition, the spin sensitivity of the magnetometer was also estimated to be 12 spins/$\sqrt{\mathrm{Hz}}$ by using optimized dispersive readout. |
| title | Identifying impurities in a silicon substrate by using a superconducting flux qubit |
| topic | Quantum Physics Superconductivity |
| url | https://arxiv.org/abs/2406.14948 |