TY - JOUR
T1 - Nonanalytic magnetic response of Fermi and non-Fermi liquids
AU - Maslov, Dmitrii L.
AU - Chubukov, Andrey V.
AU - Saha, Ronojoy
PY - 2006
Y1 - 2006
N2 - We study the nonanalytic behavior of the static spin susceptibility of two-dimensional fermions as a function of temperature and magnetic field. For a generic Fermi liquid, χs (T,H) =const+ c1 max {T, μB H}, where c1 is shown to be expressed via complicated combinations of the Landau parameters, rather than via the backscattering amplitude, contrary to the case of the specific heat. Near a ferromagnetic quantum critical point, the field dependence acquires a universal form χs -1 (H) =const- c2 H 3 2, with c2 >0. This behavior implies a first-order transition into a ferromagnetic state. We establish a criterion for such a transition to win over the transition into an incommensurate phase.
AB - We study the nonanalytic behavior of the static spin susceptibility of two-dimensional fermions as a function of temperature and magnetic field. For a generic Fermi liquid, χs (T,H) =const+ c1 max {T, μB H}, where c1 is shown to be expressed via complicated combinations of the Landau parameters, rather than via the backscattering amplitude, contrary to the case of the specific heat. Near a ferromagnetic quantum critical point, the field dependence acquires a universal form χs -1 (H) =const- c2 H 3 2, with c2 >0. This behavior implies a first-order transition into a ferromagnetic state. We establish a criterion for such a transition to win over the transition into an incommensurate phase.
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U2 - 10.1103/PhysRevB.74.220402
DO - 10.1103/PhysRevB.74.220402
M3 - Article
AN - SCOPUS:33845527189
SN - 1098-0121
VL - 74
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 22
M1 - 220402
ER -