A molecular dynamics study on indentation response of single crystalline wurtzite GaN
A series of molecular dynamics simulations are carried out to investigate the plastic
deformation in wurtzite GaN. Besides the formation of an amorphous zone under the contact
region, plastic slips nucleated on the m plane (10-10), c plane (0001), r plane (10-12), and s
plane (10-11) are observed in the indentation. Combined with a close analysis of critical
stress that induces a specific slip on different crystalline planes, the defect evolution is
discussed in detail. Slip systems of [10-1-1](10-12) and 1/3 [2-1-1-3](10-11) on the pyramidal …
deformation in wurtzite GaN. Besides the formation of an amorphous zone under the contact
region, plastic slips nucleated on the m plane (10-10), c plane (0001), r plane (10-12), and s
plane (10-11) are observed in the indentation. Combined with a close analysis of critical
stress that induces a specific slip on different crystalline planes, the defect evolution is
discussed in detail. Slip systems of [10-1-1](10-12) and 1/3 [2-1-1-3](10-11) on the pyramidal …