Hole density contrast and stress around a nickel precipitate. The green lines mark the directions of high compressive (negative) stress, which tend to show a lower hole density contrast (recombination activity). In areas of high tensile (positive) stress, the hole density contrast is increased (higher recombination activity).
Gundel et al. Nanoscale Research Letters 2011 6:197 doi:10.1186/1556-276X-6-197