Superconductivity has the steepest prerequisite curve of any topic in condensed matter physics, because the phenomenon is visible to anyone and the theory is not. BCS requires second quantisation and a working command of many-body methods, and no amount of good writing gets around that.
So the useful thing an ordering can give you here is not a route to the top but three honest places to stop. Stop one is the end of the popular and historical stage, which needs no physics at all. Stop two is a graduate-level understanding of what superconductors do — pairing, the energy gap, type I versus type II, vortices, the Josephson effect — which needs undergraduate quantum and statistical mechanics. Stop three is the microscopic theory itself. Go past that only if you intend to read current research.
History and phenomena
The cold wars is the narrative opener: Jean Matricon and Georges Waysand from Kamerlingh Onnes's liquid helium to the cuprates, written by physicists who were in the field. Order of discovery genuinely helps in this subject, because almost every theory was proposed to explain something already measured.
Superconductivity here is Stephen Blundell's very short introduction, and it is the best brief treatment at any level — pairing and flux quantisation without the formalism. Our catalogue displays it under the bare title, as it does a completely different and far larger book by Charles Poole further down the path, so buy by author.
The breakthrough is Robert Hazen's participant account of the 1986-87 high-temperature race, from inside the group that found the 90-kelvin yttrium compound. It captures what a field looks like during the few months when nobody knows the rules.
The rise of the superconductors is Ford and Saunders bridging from the popular accounts to real physics at undergraduate level — phenomena, materials, applications. This is the first honest stopping point.
The solid state physics everything else assumes
Introduction to solid state physics is Kittel, the standard undergraduate route in and the gentler of the two: crystal structure, phonons, band theory, and a superconductivity chapter that previews what is coming. Solid state physics is Ashcroft and Mermin, the book every condensed matter physicist owns and the place to go when Kittel asserts something without deriving it. Our record credits only Ashcroft; David Mermin is the co-author. Kittel is now in its eighth edition and our record is a very early one, so buy current — Ashcroft and Mermin has barely changed since 1976, so the age of that record does not matter.
What superconductors do
Superconductivity, Superfluids, and Condensates is the best entry to the theory. James Annett treats superconductivity as one instance of macroscopic quantum coherence alongside superfluid helium and Bose-Einstein condensation, which is what makes the order parameter intuitive rather than a definition to memorise.
Superfluidity and superconductivity is Tilley and Tilley on the same pair of phenomena, and stronger than Annett on the phenomenological Ginzburg-Landau theory and on flux motion. Read the two together; where they overlap they explain each other. Our record is an early edition of a book revised twice since.
Superconductivity in this stage is Poole, Farach, Creswick and Prozorov — the broad survey, with the widest coverage of materials, measurements and phenomenology of anything here, at the cost of theoretical depth. Use it as the encyclopaedia beside Annett's course. It is the second book on this path filed under that bare title and it is nothing like Blundell's.
This is the second stopping point, and for most readers it is the right one.
BCS, and the standard references
Theory of superconductivity is by the S of BCS, and still the clearest statement of the microscopic argument from someone who made it: the variational ground state, the gap equation, the field-theoretic machinery. It assumes second quantisation and does not apologise for it.
Superconductivity of Metals and Alloys is de Gennes, and the best treatment of the Bogoliubov-de Gennes equations, boundary problems and the proximity effect. He thinks in real space where Schrieffer thinks in momentum space, and having both is what makes vortex and interface problems tractable.
Introduction to superconductivity is Tinkham, the standard reference of the field and the one book here to own outright. One warning that matters: our record is the 1975 first edition, and the high-temperature cuprates appear only in the second edition of 1996, which is the one universally cited. Buy the second edition.
If you are going further
Introduction to Many-Body Physics is Coleman on the machinery the modern literature is written in — Green functions, path integrals, broken symmetry — with superconductivity treated as a central example rather than an appendix. Applied Superconductivity closes with a deliberate change of register: a multi-author handbook on wires and magnets, SQUIDs and detectors, RF cavities and superconducting qubits, where the theory meets the engineering that pays for it. The stages, and what each assumes, are set out at /paths/pt_ai_superconductivity.
