Under constant GaCl and NH3 partial pressures , reducing {HEAD ~ the growth temperature} alters the growth morphology from a smooth, hillocked structure to {TAIL ~ a pitted surface morphology} and eventually to polycrystalline growth 
Under constant GaCl and NH3 partial pressures , reducing { HEAD ~ the growth temperature } alters the growth morphology from a smooth , hillocked structure to { TAIL ~ a pitted surface morphology } and eventually to polycrystalline growth
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH