Magnetic breakdown in ortho-II high-temperature cuprates

TL;DR

This paper investigates magnetic breakdown and de Haas-van Alphen oscillations in ortho-II high-temperature cuprates to understand the origin of multiple frequencies observed in experiments, highlighting the sensitivity to Fermi surface topology.

Contribution

It provides a theoretical analysis of magnetic breakdown effects in ortho-II cuprates, linking oscillation frequencies to Fermi surface topology and ortho-II potential.

Findings

Magnetic breakdown sensitivity depends on Fermi surface topology.

Multiple oscillation frequencies can be explained by magnetic breakdown.

The results help distinguish between different theoretical models.

Abstract

The recent confirmation of closed Fermi surface in the high temperature cuprates via de Haas-van Alphen and Shubnikov-de haas oscillations calls for a theoretical investigation of the origin of such oscillations. We study de Haas-van Alphen oscillations and magnetic breakdown in the context of ortho-II high temperature cuprates to understand the origin of the multiple frequencies. We find that the magnetic breakdown is highly sensitive not only to the ortho-II potential, but also to the Fermi surface topology, and is thus useful to distinguish between various theoretical proposals related to quantum oscillations.