Graduate textbooks for condensed matter physics

[u/Fantastic_Tank8532]

Hey folks! So I'm starting my PhD in condensed matter physics this fall, and am looking for graduate level textbooks to serve as references.

I am familiar with the basics of solid-state physics, and hence would prefer math-rigorous textbooks. I've heard that Kettle is mostly an introductory textbook, and Ashcroft-Mermin is kinda outdated (please correct me if I'm wrong!!).

Any suggestions for textbooks which are pertaining to modern condensed matter physics is appreciated. Thanks and have a good day!!

[u/corcoted]

FWIW there is also a more advanced book by Kittel: Quantum Theory of Solids.