Transition from non Fermi Liquid Behavior to Landau Fermi Liquid Behavior Induced by Magnetic Fields

Abstract

We show that a strongly correlated Fermi system with the fermion condensate, which exhibits strong deviations from Landau Fermi liquid behavior, is driven into the Landau Fermi liquid by applying a small magnetic field $B$ at temperature T=0. This field-induced Landau Fermi liquid behavior provides the constancy of the Kadowaki-Woods ratio. A reentrance into the strongly correlated regime is observed if the magnetic field $B$ decreases to zero, then the effective mass $M^{\ast }$ diverges as $M^{\ast }\propto 1/\sqrt{B}$. At finite temperatures, the strongly correlated regime is restored at some temperature $T^{\ast }\propto \sqrt{B}$. This behavior is of general form and takes place in both three dimensional and two dimensional strongly correlated systems. We demonstrate that the observed $1/\sqrt{B}$ divergence of the effective mass and other specific features of heavy-fermion metals are accounted for by our consideration.

8 pages, Revtex

References in corpus (1)

• Magnetic-Field Induced Quantum Critical Point in YbRh${}_2$Si${}_2$

Cited by in corpus (9)

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• Flat bands and the physics of strongly correlated Fermi systems
• Fermion Condensation Quantum Phase Transition versus Conventional Quantum Phase Transitions
• Magnetic field-induced Landau Fermi Liquid in high-T_c metals
• Quantum critical point in high-temperature superconductors
• Hall coefficient in heavy fermion metals