Quantum oscillations and key theoretical issues in high temperature superconductors from the perspective of density waves

TLDR: In this article, the authors focus on the recent magnetic oscillation experiments and how they fit into the broader picture of superconductivity in cuprate superconductors and show that many aspects of these experiments can be explained by Fermi liquid theory, and the key issue is the extent to which this is true.

Abstract: High temperature superconductivity in cuprate superconductors remains an unsolved problem in theoretical physics. The same statement can also be made about a number of other superconductors that have been dubbed novel. What makes these superconductors so elusive is an interesting question in itself. This paper focuses on the recent magnetic oscillation experiments and how they fit into the broader picture. Many aspects of these experiments can be explained by Fermi liquid theory; the key issue is the extent to which this is true. If true, the entire paradigm developed over the past three decades must be reexamined. A critical analysis of this issue has necessitated a broader analysis of questions about distinct ground states of matter, which may be useful in understanding other novel superconductors.