Spin-lattice relaxation of NV centers in nanodiamonds adsorbed on conducting and nonconducting surfaces

Benedičič, Iztok (avtor), Tanuma, Yuri (avtor), Gosar, Žiga (avtor), Anézo, Bastien (avtor), Mrózek, Mariusz (avtor), Wojciechowski, Adam (avtor), Arčon, Denis (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: nanodiamonds, electron paramagnetic resonance spectroscopy, spin-lattice relaxation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: Str. 235421-1-235421-10
• Številčenje: Vol. 111, iss. 23
• PID: 20.500.12556/RUL-169872
• UDK: 53
• ISSN pri članku: 2469-9969
• DOI: 10.1103/1s53-5wls
• COBISS.SI-ID: 239155203
• Datum objave v RUL: 13.06.2025

Gradivo je del revije

• Naslov: Physical review
• Skrajšan naslov: Phys. rev. B.
• Založnik: American Physical Society
• ISSN: 2469-9969
• COBISS.SI-ID: 3042148

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: nanodiamanti