IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
REENTRANT BEHAVIOUR IN LANDAU FERMI LIQUIDS WITH SPIN-SPLIT POMERANCHUK INSTABILITIES
Autor/es:
P. RODRÍGUEZ PONTE; D.C. CABRA; N. GRANDI
Revista:
MODERN PHYSICS LETTERS B
Editorial:
WORLD SCIENTIFIC PUBL CO PTE LTD
Referencias:
Lugar: London, UK; Año: 2012
ISSN:
0217-9849
Resumen:
We study the effects of spin-antisymmetric interactions on the stability of a Landau-Fermi liquid on the square lattice, using the generalized Pomeranchuk method for two-dimensional lattice systems. In particular, we analyze interactions that could induce instabilities of the so called spin-split type, that is when spin-up and spin-down Fermi surfaces are displaced with respect to each other. The phase space is studied as a function of the strength of the interaction V, the electron chemical potential mu and an external magnetic field h. We find that such interactions produce in general an enhancement of the instability region of the Landau-Fermi liquid. More interestingly, in certain regions of the V-mu phase space, we find a reentrant behaviour as a function of the magnetic field h, similar to that found in recent experiments, e.g. in URu2Si2 and Sr3Ru2O7.