20.500.12556/RUL-169872 Spin-lattice relaxation of NV centers in nanodiamonds adsorbed on conducting and nonconducting surfaces The nitrogen-vacancy (NV) color 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 $\sim$ 6K. The NV relaxation curves fit to a stretched-exponential form with a stretching exponent $\alpha \approx 0.7$, 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. nanodiamonds electron paramagnetic resonance spectroscopy spin-lattice relaxation nanodiamanti true false true Angleški jezik Slovenski jezik Članek v reviji 2025-06-13 08:53:38 2025-06-13 08:53:44 2025-06-14 04:53:09 0000-00-00 00:00:00 2024 0 0 Str. 235421-1-235421-10 iss. 23 Vol. 111 Jun. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 53 2469-9969 10.1103/1s53-5wls 239155203 https://journals.aps.org/prb/abstract/10.1103/1s53-5wls 1 a656c362-4821-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211623 1s53-5wls.pdf 1s53-5wls.pdf 1 576AEFCDEDA7061A6E497F6FB3DB6C68 66a2b70757cec5f6f7160c62d20e2df98598643993015bd77687e8ed21b1a3f4 f01a00c0-4823-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211629 Fakulteta za matematiko in fiziko 0 0 0