Determination of local defect density in diamond by double electron-electron resonance

TL;DR

This paper introduces a local measurement technique using double electron-electron resonance to quantify defect densities in diamond, enhancing understanding of spin relaxation and improving sensor development.

Contribution

The paper presents a novel local measurement method for defect concentration in diamond using double electron-electron resonance, aiding in better understanding and optimization.

Findings

Effective quantification of defect densities achieved

Improved understanding of spin relaxation mechanisms

Potential for enhanced diamond-based sensor performance

Abstract

Magnetic impurities in diamond influence the relaxation properties and thus limit the sensitivity of magnetic, electric, strain, and temperature sensors based on nitrogen-vacancy color centers. Diamond samples may exhibit significant spatial variations in the impurity concentrations hindering the quantitative analysis of relaxation pathways. Here, we present a local measurement technique which can be used to determine the concentration of various species of defects by utilizing double electron-electron resonance. This method will help to improve the understanding of the physics underlying spin relaxation and guide the development of diamond samples, as well as offering protocols for optimized sensing.