| Autor: |
PONTE, P. RODRÍGUEZ, CABRA, D. C., GRANDI, N. |
| Předmět: |
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| Zdroj: |
Modern Physics Letters B; 7/30/2012, Vol. 26 Issue 19, p1250125-1-1250125-9, 9p, 1 Diagram, 1 Graph |
| Abstrakt: |
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 μ 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-μ phase space, we find a reentrant behavior as a function of the magnetic field h, similar to that found in recent experiments, e.g. in URu2Si2 and Sr3Ru2O7. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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