I've searched the internet and two famous QM books (Sakurai and Messiah) for Lenz's Law, but haven't found anything. So my question is what the quantum mechanical explanation to Lenz's law is? Can anyone give some references?
J.D. Jackson (Sec. 6.6) does an excellent yet brief treatment of the derivation of the macroscopic Maxwell's equations from a microscopic picture if that is what you are looking for.