A brief discussion on the course of development in the high-temperature superconductivity research is presented from my personal perspective, focusing on the lattice effects. In spite of the tidal waves of colorful and unconventional spin-based ideas on the origin of high-temperature superconductivity promoted by prominent theoreticians, Alex Müller has been the true invariant who stood by his intuition and conviction that the lattice, not the spin fluctuation, provides the basis for the mechanism of high-temperature superconductivity. Recent developments are beginning to show that after all he may have been right all along.
Egami, T. (2017). Alex and the origin of high-temperature superconductivity. Springer Series in Materials Science, 255, 35–46. https://doi.org/10.1007/978-3-319-52675-1_4