I have contacted a potential PhD supervisor and he sent me back a positive email and asked "have you contacted anyone else in the department or just me at this stage?".
I have replied to the email in a very short notice and stated that I have directly contacted him after careful consideration of the academic staff profile because I can more easily merge with the research theme he works on.
It has been 2 weeks but haven't received a reply, should I write a follow up email? If yes, what should I write in it?