Spin-lattice relaxation of NV centers in nanodiamonds adsorbed on conducting and nonconducting surfaces
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2025-05-21 |
| Journal | Physical review. B./Physical review. B |
| Authors | NULL AUTHOR_ID, Yuri Tanuma, Ćœiga Gosar, Bastien AnĂ©zo, Mariusz MrĂłzek |
| Institutions | University of Ljubljana, Jagiellonian University |
Abstract
Section titled âAbstractâThe 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 <a:math xmlns:a=âhttp://www.w3.org/1998/Math/MathMLâ><a:mrow><a:mo>µ</a:mo><a:mi mathvariant=ânormalâ>m</a:mi></a:mrow></a:math> between room temperature and <c:math xmlns:c=âhttp://www.w3.org/1998/Math/MathMLâ><c:mrow><c:mo>âŒ</c:mo><c:mn>6</c:mn><c:mspace width=â3.33333ptâ/><c:mi mathvariant=ânormalâ>K</c:mi></c:mrow></c:math>. The NV relaxation curves fit to a stretched-exponential form with a stretching exponent <f:math xmlns:f=âhttp://www.w3.org/1998/Math/MathMLâ><f:mrow><f:mi>α</f:mi><f:mo>â</f:mo><f:mn>0.7</f:mn></f:mrow></f:math>, 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.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
Section titled âReferencesâ- 1986 - The Principles of Nuclear Magnetism