de Haas-van Alphen oscillations in quasi-two-dimensional underdoped cuprate superconductors in the canonical ensemble

TL;DR

This paper models the de Haas-van Alphen effect in underdoped cuprate superconductors, revealing how Fermi surface features influence quantum oscillations and Hall resistance, providing insights into their electronic structure.

Contribution

It introduces a canonical ensemble calculation of dHvA oscillations for specific Fermi surface scenarios in underdoped cuprates, highlighting the role of a charge reservoir segment.

Findings

Harmonic content aligns with a second Fermi surface section acting as a charge reservoir.

Charge density oscillations may explain large quantum oscillations in Hall resistance.

Modeling supports the existence of multiple Fermi surface components in underdoped cuprates.

Abstract

We calculate the de Haas-van Alphen (dHvA) effect waveform using the canonical ensemble for different Fermi surface scenarios applicable to the underdoped cuprate superconductor YBa2Cu3O6.5, in which quantum oscillations have recently been observed. The harmonic content of the dHvA waveform of the principal F ~ 500 T frequency is consistent with the existence of a second thermodynamically dominant section of Fermi surface that acts primarily as a charge reservoir. Oscillations in the charge density to and from this reservoir are shown to potentially contribute to the observed large quantum oscillations in the Hall resistance.