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Updated: May 8, 2025
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.4K
Anomalous Quantum Oscillations from Boson-Mediated Interband Scattering.
Léo Mangeolle1,2, Johannes Knolle1,2,3
1Technical University of Munich, TUM School of Natural Sciences, Physics Department, 85748 Garching, Germany.
Physical Review Letters
|April 25, 2025
Summary
We introduce composite frequency quantum oscillations (CFQOs) in metals, explaining phenomena beyond semiclassical Fermi surface theories. Our work reveals interaction effects and anomalous frequency splitting in quantum oscillations.
Area of Science:
- Condensed matter physics
- Quantum mechanics
- Materials science
Background:
- Quantum oscillations (QOs) in metals typically link to Fermi surface trajectories.
- Recent experiments present QO phenomena not explained by standard semiclassical models.
- Understanding these deviations is crucial for advancing condensed matter physics.
Purpose of the Study:
- To develop a theoretical framework for composite frequency quantum oscillations (CFQOs).
- To explain QOs in two-dimensional Fermi liquids with multiple Fermi surfaces and interband scattering.
- To highlight the role of interactions and dynamical bosons in QO phenomena.
Main Methods:
- Theoretical modeling of fermionic self-energy in two-dimensional Fermi liquids.
- Analysis of interband scattering mediated by dynamical bosons (phonons, spin fluctuations).
- Investigation of anomalous frequency splitting and non-Lifshitz-Kosevich temperature dependencies.
Main Results:
- Demonstrated the emergence of CFQOs from oscillations in the fermionic self-energy.
- Identified anomalous frequency splitting and unique temperature dependences in CFQOs.
- Showcased how interaction effects modify QO behavior beyond semiclassical approximations.
Conclusions:
- CFQOs offer a new perspective on quantum oscillations, extending beyond Fermi surface trajectories.
- The developed theory accounts for interaction effects and interband scattering.
- Predictions for experimental verification and implications for driven systems are discussed.
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