Anomalous Quantum Oscillations Beyond the Onsager Fermi Surface Paradigm (Springer Theses)

This book opens new ways for probing electronic correlations, emergent phenomena, and unconventional metallic states.The Fermi surface governs the fundamental properties of metals.Quantum oscillation measurements are the most precise method for determining Fermi surface properties in bulk three-dimensional metals, owing to Onsager’s relation, which connects the oscillation frequency to an extremal cross-section of the Fermi surface.This canonical, semiclassical theory of quantum oscillations has been remarkably successful in unearthing electronic properties of metals for over 75 years.However, with the emergence of modern quantum materials and advancements in experimental sensitivity, breakdowns of the semiclassical theory have recently come to light.In this thesis, we demonstrate that additional quantum oscillation frequencies-breaking Onsager’s relation-emerge generically in multiband metals.These anomalous frequencies, referred to as non-Onsager oscillations, are induced by impuriti