Reentrant behaviour in Landau Fermi liquids with Pomeranchuk instabilities

P. RODRÍGUEZ PONTE; D.C. CABRA; N. GRANDI

Natal

Workshop; Workshop on Geometrically Frustrated Magnets: From Spin Ice to Kagome Planes; 2011

IIP (International Institute of Physics)

We study the effects of spin-antisymmetric interactions on the stability of the Landau-Fermi liquid description. In particular we focus on the type of interactions proposed by Varma \textit{et al} to describe the hidden order transition in $URu_2Si_2$. In the presence of a magnetic field this type of interactions produce an enhanced region of instabilities of the Pomeranchuk type. More interestingly, we find a reentrant behaviour as a function of the magnetic field $h$, similar to that found in recent experiments, in certain regions of the $V$-$\mu$ phase space.