New Fundamental dHvA Frequency in Canonical Low-Dimensional Fermi Liquids

TL;DR

This paper reveals a new fundamental dHvA frequency in low-dimensional Fermi liquids, demonstrating its robustness and potential for detecting small Fermi surface pockets through forbidden frequencies.

Contribution

It introduces a new fundamental dHvA frequency in canonical Fermi liquids and analyzes its robustness and measurement potential.

Findings

Discovery of a new fundamental dHvA frequency P_f

Robustness of P_f against Landau level smearing

Potential to measure small Fermi surface pockets

Abstract

We show that a new fundamental period $P_{f}$ of dHvA oscillations, which appears along with other ``forbidden'' combination frequencies in a multi-band canonical Fermi-liquid, is very robust with respect to a finite smearing of Landau levels and a background of non-quantized states. We analyse the possibility of measuring small Fermi surface pockets with the use of the ``forbidden'' frequencies.