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arXiv · 1407.4131

Non-analytic magnetic field dependence of quasi-particle properties of two-dimensional metals

Casper Drukier·Philipp Lange·Peter Kopietz
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Abstract

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.

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Casper Drukier, Philipp Lange, Peter Kopietz. 2014-07-15. Non-analytic magnetic field dependence of quasi-particle properties of two-dimensional metals. https://doi.org/10.1140/epjb/e2014-50779-6

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