Dear XXX
Thanks for your interest in our department. Applications for our PhD program don’t go to individual faculty members, but instead to the department, following the university’s general procedures. All admissions decisions are made by the department’s faculty as a whole, not by individual faculty members. The application procedure and other information are here:
Personally, since I am near retirement, I am not encouraging students to apply to work with me; but our department has many faculty resources might interest you instead.