Spin-lattice relaxation of NV centers in nanodiamonds adsorbed on conducting and non-conducting surfaces
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918133845983232 |
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| author | Benedičič, Izidor Tanuma, Yuri Gosar, Žiga Anézo, Bastien Mrózek, Mariusz Wojciechowski, Adam Arčon, Denis |
| author_facet | Benedičič, Izidor Tanuma, Yuri Gosar, Žiga Anézo, Bastien Mrózek, Mariusz Wojciechowski, Adam Arčon, Denis |
| contents | The nitrogen-vacancy (NV) centers in nanodiamonds can be utilized as low-cost, highly versatile quantum sensors for studying surface properties in condensed matter physics through the application of relaxometry protocols. For such applications, a detailed knowledge of the intrinsic relaxation processes of NV centers in nanodiamonds is necessary. Here, we study the spin-lattice relaxation rates of NV ensembles in nanodiamonds with average diameters of 40 nm and 3 $μ$m between room temperature and $\sim$ 6 K. The NV relaxation curves fit to a stretched-exponential form with a stretching exponent $α\approx 0.7$, implying the large distribution of relaxation times of individual centers within nanodiamonds. We determine the Orbach-like scattering on phonons as the leading relaxation mechanism. Finally, we discuss the viability of nanodiamonds as surface sensors when deposited on a metallic substrate and emphasize the need for well-controlled surface preparation techniques. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_04172 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin-lattice relaxation of NV centers in nanodiamonds adsorbed on conducting and non-conducting surfaces Benedičič, Izidor Tanuma, Yuri Gosar, Žiga Anézo, Bastien Mrózek, Mariusz Wojciechowski, Adam Arčon, Denis Mesoscale and Nanoscale Physics The nitrogen-vacancy (NV) centers in nanodiamonds can be utilized as low-cost, highly versatile quantum sensors for studying surface properties in condensed matter physics through the application of relaxometry protocols. For such applications, a detailed knowledge of the intrinsic relaxation processes of NV centers in nanodiamonds is necessary. Here, we study the spin-lattice relaxation rates of NV ensembles in nanodiamonds with average diameters of 40 nm and 3 $μ$m between room temperature and $\sim$ 6 K. The NV relaxation curves fit to a stretched-exponential form with a stretching exponent $α\approx 0.7$, implying the large distribution of relaxation times of individual centers within nanodiamonds. We determine the Orbach-like scattering on phonons as the leading relaxation mechanism. Finally, we discuss the viability of nanodiamonds as surface sensors when deposited on a metallic substrate and emphasize the need for well-controlled surface preparation techniques. |
| title | Spin-lattice relaxation of NV centers in nanodiamonds adsorbed on conducting and non-conducting surfaces |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2503.04172 |