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Resonant and anti‐resonant modes of the dilute, spin‐inbalanced, two‐dimensional electron liquid including correlations
Author(s) -
Kreil Dominik,
Staudinger Clemens,
Astleithner Katharina,
Böhm Helga M.
Publication year - 2018
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201700147
Subject(s) - random phase approximation , excitation , physics , condensed matter physics , spin (aerodynamics) , plasmon , charge (physics) , linear response theory , electron , phase (matter) , fermi gas , resonance (particle physics) , quantum mechanics , thermodynamics
A spin‐sensitive linear response theory is presented that includes correlations beyond the well‐known random phase approximation. Especially for very dilute systems, such correlations play an important role. The response functions obtained give insight into both charge and longitudinal magnetic excitations. In addition to the spin‐plasmon, we propose a new regime where no magnetic excitation is possible, namely the magnetic anti‐resonance. Both effects lie in experimentally accessible ranges.