Journal
PHYSICAL REVIEW B
Volume 71, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.71.201302
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We consider a two-dimensional electron system with Coulomb interaction between particles at a finite temperature T. We show that the dynamic Kohn anomaly in the response function at 2k(F) leads to a nonanalytic, linear-in-T correction to the spin susceptibility, delta chi(T) =aT, the same as in systems with short-range interaction. We show that the singularity of the Coulomb interaction at q=0 does not invalidate the expansion of the prefactor a in powers of r(s), but makes the expansion nonanalytic.
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