Room temperature relaxometry of single nitrogen-vacancy centers in proximity to $\alpha$-RuCl${}_3$ nanoflakes

Abstract

Investigating spin and charge noise in strongly correlated electron systems is a valuable way to analyze their physical properties and unlock new phases of matter. In this context, nitrogen-vacancy (NV) center-based magnetometry has been proven to be a versatile sensor for various classes of magnetic materials in broad temperature and frequency ranges. Here, we use longitudinal relaxation time $T_1$ of single NV centers to investigate the spin dynamics of nanometers-thin flakes of $\alpha$-RuCl${}_3$ at room temperature. We observe a significant reduction in the $T_1$ in the presence of $\alpha$-RuCl${}_3$ in proximity to our NVs, which we attribute to paramagnetic spin noise confined in the 2D hexagonal plane. Furthermore, the $T_1$ time exhibits an almost linear increase with an applied external magnetic field. We associate this trend with the alteration of spin and charge noise in $\alpha$-RuCl${}_3$ under an external magnetic field. These findings suggest that the influence of the room-temperature spin dynamics of $\alpha$-RuCl${}_3$ on the longitudinal relaxation time of the NV center can be used to gain information on the material itself and the technique to be used on other 2D materials.

References in corpus (18)

• Identifying Topological Order by Entanglement Entropy
• Tutorial: A Beginner's Guide to Interpreting Magnetic Susceptibility Data with the Curie-Weiss Law
• Scanning magnetic field microscope with a diamond single-spin sensor
• Scattering Continuum and Possible Fractionalized Excitations in $\alpha$-RuCl${}_3$
• Magnetic order in $\alpha$-RuCl${}_3$: a honeycomb lattice quantum magnet with strong spin-orbit coupling
• Scalable quantum register based on coupled electron spins in a room temperature solid
• Spin-wave excitations evidencing the Kitaev interaction in single crystalline $\alpha$-RuCl${}_3$
• Nano-engineered Diamond Waveguide as a Robust Bright Platform for Nanomagnetometry Using Shallow Nitrogen Vacancy Centers
• Tracking Temperature Dependent Relaxation Times of Individual Ferritin Nanomagnets with a Wide-band Quantum Spectrometer
• Quantum Sensing of Spin Transport Properties of an Antiferromagnetic Insulator
• Imaging de Haas-van Alphen quantum oscillations and milli-Tesla pseudomagnetic fields
• Quantitative study of the response of a single NV defect in diamond to magnetic noise
• The Role of Electrolytes in the Relaxation of Near-Surface Spin Defects in Diamond
• (111)-oriented, single crystal diamond tips for nanoscale scanning probe imaging of out-of-plane magnetic fields
• Spin dynamics of a solid-state qubit in proximity to a superconductor
• Multicone Diamond Waveguides for Nanoscale Quantum Sensing
• Emergent orbital magnetization in Kitaev quantum magnets
• Proposal to detect emergent gauge field and its Meissner effect in spin liquids using NV Centers

Cited by in corpus (2)

• Spin-lattice relaxation of NV centers in nanodiamonds adsorbed on conducting and non-conducting surfaces
• Probing GHz Spin Dynamics Across Magnetic Phase Transitions in CrCl3 Nanoflakes Using Nitrogen-Vacancy Microscopy