I am going to present my candidacy for a Ph.D. position. For this, I have prepared a version of my CV using Latex and moderncv. The moderncv template includes both the CV and the cover letter in the same document. This is the first time I have seen this, and I wonder what are the pros and cons of including both of them in the same document vs. sending them in separate PDF files. Also, which approach is the most common?
Just in case it is relevant: several positions are offered (each one in a different topic under a different advisor) and I am presenting my candidacy for the subset of topics that I am interested in. The recipient of the email is the department account, so I have no idea who is actually receiving and dispatching my request.