2005/05/31 by Suhas Gangadharaiah, Dmitrii L. Maslov · 2 citations
Physics and Astronomy · #Advanced Chemical Physics Studies #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.95.186801
published as Phys. Rev. Lett. 95, 186801 (2005) · 5 pages, 3 figures
arxiv created 2005/05/31 · openalex publication_date 2005/10/26 · arxiv updated 2011/07/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In a generic spin-polarized Fermi liquid, the masses of spin-up and spin-down electrons are expected to be different and to depend on the degree of polarization. This expectation is not confirmed by the experiments on two-dimensional heterostructures. We consider a model of an N-fold degenerate electron gas. It is shown that in the large- limit, the mass is enhanced via a polaronic mechanism of emission or absorption of virtual plasmons. As plasmons are classical collective excitations, the resulting mass does not depend on , and thus on polarization, to the leading order in 1/N. We evaluate the 1/N corrections and show that they are small even for N = 2.