APS Journals Homepage: https://journals.aps.org/
Physical Review Letters (PRL) (brief important papers, all topics in physics): https://journals.aps.org/prl
Physical Review A (atomic, molecular, and optical physics): https://journals.aps.org/pra
Physical Review B (condensed matter and materials physics): https://journals.aps.org/prb
Physical Review C (nuclear physics): https://journals.aps.org/prc
Physical Review D (particles, fields, gravitation and cosmology): https://journals.aps.org/prd
Physical Review E (statistical, nonlinear, and soft matter physics): https://journals.aps.org/pre
Physical Review X (open access articles, all topics of physics): https://journals.aps.org/prx
Physical Review X Energy (open access articles, all topics of physics): https://journals.aps.org/
Physical Review X Quantum (all topics of physics): https://journals.aps.org/
Physical Review Applied (applied physics): https://journals.aps.org/
Physical Review Fluids (fluid dynamics): https://journals.aps.org/
Physical Review Materials (multidisciplinary materials research): https://journals.aps.org/
Physical Review Research (all topics of physics): https://journals.aps.org/
Reviews of Modern Physics (in-depth articles, all topics in physics): https://journals.aps.org/rmp
Physical Review Accelerators and Beams: https://journals.aps.org/
Physical Review Physics Education Research: https://journals.aps.org/
The APS Journal Archive (back to 1893): https://journals.aps.org/
Additional physics publications with no location restrictions:
Physics (highlighting significant papers from APS journals): http://physics.aps.org/
Physics Central (educational/informational site about physics, for students and the public): http://www.physicscentral.com/