Can anyone suggest me letter of motivation for Phd in computer science.my research work is based on neuroscience and computers applications

Hi, Thank you so much for you kind support...

Hi, I have done MTECH with first division in computer science & engineering. My teaching experience in engineering college is 5 yrs after MTECH. My research areas are network security and nuro science with engineering.
Kindly help me to find good universities for Phd.
I am already received govt scholarship for my study.