I've been using org-roam for my research for a couple of months now, which has a lot of overlap.

The org-roam-server visualisation are really useful for me, since it makes it easier to see what areas have sparsity in them and should be expanded upon. Plus it gives me something more tangible to look at to understand how my research is expanding, there's a bigger sense of "building something". https://github.com/org-roam/org-roam-server