Moiseenko, Ilia and Moench, Erwin and Kapralov, Kirill and Bandurin, Denis and Ganichev, Sergey and Svintsov, Dmitry (2025) Testing the Tomographic Fermi Liquid Hypothesis with High-Order Cyclotron Resonance. PHYSICAL REVIEW LETTERS, 134 (22): 226902. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
The tomographic Fermi liquid (TFL) hypothesis posits starkly different relaxation times for odd and even angular harmonics of electron distribution function in two-dimensional systems, but its experimental verification remains elusive. Traditional electrical transport struggles to discern these lifetimes, as resistivity is largely unaffected by electron scattering. Here, we demonstrate that high-order cyclotron resonance (CR) offers a direct probe: The linewidth of the mth CR peak directly reflects the relaxation rate gamma(m) = 1/tau(m) of the corresponding angular harmonic. Combining theory and terahertz photoconductivity measurements in graphene, we show that the third-order CR exhibits a narrower linewidth than the secondorder CR, yielding tau(3) > tau(2). This hierarchy defies conventional impurity or phonon scattering models, instead aligning with TFL predictions where odd harmonics evade relaxation via head-on collisions. Our results provide definitive evidence for the TFL regime and establish high-order CR as a powerful tool to unravel hydrodynamic transport in quantum materials.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BERNSTEIN MODES; ELECTRON; PHOTOCONDUCTIVITY |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Jul 2026 09:35 |
| Last Modified: | 28 Jul 2026 09:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66639 |
Actions (login required)
 |
View Item |
