Dear Aspirant!

Congrats you are eligible to apply based on your JAM score. But you need to separately appear for JNCASR written test and after that interview. They shortlists candidates after this procedure.

Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) is a research institute located at Jakkur, Bangalore, India. It has a faculty-to-student ratio of about 1:4 and state-of-the-art experimental, computational and infrastructural facilities. It provides Ph.D. programmes, as well as an Integrated Ph.D. (post-bachelor's degree) program in Materials Science.

I hope it solved your query. All the best!