Density dependent spin susceptibility and effective mass in interacting quasi-two dimensional electron systems

Details Density dependent spin susceptibility and effective mass in interacting quasi-two dimensional electron systems Density dependent spin susceptibility and effective mass in interacting quasi-two dimensional electron systems

2004-08-14

arxiv.org/abs/cond-mat/0408335v3

Phys. Rev. B 72, 075308 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.72.075308

Motivated by recent experimental reports, we carry out a Fermi liquid many-body calculation of the interaction induced renormalization of the spin susceptibility and effective mass in realistic two dimensional (2D) electron systems as a function of carrier density using the leading-order `ladder-bubble' expansion in the dynamically screened Coulomb interaction. Using realistic material parameters for various semiconductor-based 2D systems, we find reasonable quantitative agreement with recent experimental susceptibility and effective mass measurements. We point out a number of open questions regarding quantitative aspects of the comparison between theory and experiment in low-density 2D electron systems.

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