Science

Diamond defects confirm 80-year-old theory of crystal stress

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Briefings

Researchers in Japan successfully mapped the stress field around an atomic-scale flaw in diamond using nitrogen-vacancy centers. Led by Tokuyuki Teraji at the National Institute for Materials Science, this direct mapping confirms an 80-year-old theory about how crystal stress affects diamond properties. The study utilized the unique spin states of NV centers, which react differently to stress based on orientation relative to the field.

Key points

• Researchers led by Tokuyuki Teraji at the National Institute for Materials Science directly mapped the stress field surrounding an atomic-scale flaw in diamond using nitrogen-vacancy centers.
• The spin states of NV centers respond differently to stress depending on their orientation relative to the stress field, enabling the direct measurement of the stress distribution.

Context

This research confirms an 80-year-old theory regarding crystal stress in diamond, published in 2026. The findings utilize nitrogen-vacancy centers in diamond to probe atomic-scale stress fields, providing a new method to understand material behavior under pressure.

Limitations

The study covers only a few components of the stress field around a single atomic-scale flaw. Results are limited to the specific NV center orientation relative to the stress field and do not represent the entire diamond structure or all possible stress scenarios.

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