2014/07/31 by Casper Drukier, Philipp Lange, Peter Kopietz
Mathematics · Physics and Astronomy · #Condensed matter physics #Field (mathematics) #Field dependence #Geology #Magnetic field #Materials science #Mathematics #Particle (ecology) #Physics #Quantum and electron transport phenomena #Quantum mechanics #Rare-earth and actinide compounds #Surface and Thin Film Phenomena #cond-mat.str-el
paper · pdf · doi:10.1140/epjb/e2014-50779-6
published as Eur. Phys. J. B 88, 41 (2015) · 11 pages, 5 figures
openalex publication_date 2015/01/30 · arxiv created 2015/02/04 · arxiv updated 2015/02/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that in a weak external magnetic field H the quasi-particle residue and the renormalized electron Lande factor of two-dimensional Fermi liquids exhibit a non-analytic magnetic field dependence proportional to |H| which is due to electron-electron interactions. We explicitly calculate the corresponding prefactors to second order in the interaction and show that they are determined by low-energy scattering processes involving only momenta close to the Fermi surface. Experimentally, these non-analytic terms can be detected from measurements of the magnetic field dependence of the density of states and the magnetoconductivity.