Temperature dependence of spin susceptibility in two-dimensional Fermi liquid systems

Details Temperature dependence of spin susceptibility in two-dimensional Fermi liquid systems Temperature dependence of spin susceptibility in two-dimensional Fermi liquid systems

2006-12-04

arxiv.org/abs/cond-mat/0612078v1

Phys. Rev. B 74, 205122 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 2 Figures

Scientific paper

10.1103/PhysRevB.74.205122

We consider the non-analytic terms in the spin susceptibility arising as a result of rescaterring of pairs of quasiparticles. We emphasize the importance of rescattering in the Cooper channel for the analysis of the temperature dependences in the two-dimensional electron systems in the ballistic regime. In the calculation of the linear in $T$ term we use angular harmonics in the Cooper channel, because for each harmonic the interaction amplitude is renormalized independently. We observe, that as a consequence of strong renormalizations in the Cooper ladder, the temperature derivative of the spin susceptibility may change its sign at low temperatures.

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