Antiferromagnetic spin phase transition in nuclear matter with effective Gogny interaction

Details Antiferromagnetic spin phase transition in nuclear matter with effective Gogny interaction Antiferromagnetic spin phase transition in nuclear matter with effective Gogny interaction

2004-08-26

arxiv.org/abs/nucl-th/0408064v2

Phys.Rev. C70 (2004) 064310

Physics

Nuclear Physics

Nuclear Theory

Report at the workshop "Hot points in astrophysics and cosmology", Dubna, August, 2-13, 2004. REVTeX4, 9 pages, 3 figures

Scientific paper

10.1103/PhysRevC.70.064310

The possibility of ferromagnetic and antiferromagnetic phase transitions in symmetric nuclear matter is analyzed within the framework of a Fermi liquid theory with the effective Gogny interaction. It is shown that at some critical density nuclear matter with D1S effective force undergoes a phase transition to the antiferromagnetic spin state (the opposite direction of neutron and proton spins). The self--consistent equations of spin polarized nuclear matter with D1S force have no solutions, corresponding to the ferromagnetic spin ordering (the same direction of neutron and proton spins) and, hence, the ferromagnetic transition does not appear. The dependence of antiferromagnetic spin polarization parameter as a function of density is found at zero temperature.

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