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Spin-polarized states in neutron matter in a strong magnetic field

Title
Spin-polarized states in neutron matter in a strong magnetic field
Authors
Isayev A.A.Yang J.
Ewha Authors
양종만
SCOPUS Author ID
양종만scopus
Issue Date
2009
Journal Title
Physical Review C - Nuclear Physics
ISSN
0556-2813JCR Link
Citation
vol. 80, no. 6
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Spin-polarized states in neutron matter in strong magnetic fields up to 1018G are considered in the model with the Skyrme effective interaction. By analyzing the self-consistent equations at zero temperature, it is shown that a thermodynamically stable branch of solutions for the spin-polarization parameter as a function of density corresponds to the negative spin polarization when the majority of neutron spins are oriented opposite to the direction of the magnetic field. Besides, beginning from some threshold density dependent on magnetic field strength, the self-consistent equations also have two other branches of solutions for the spin-polarization parameter with the positive spin polarization. The free energy corresponding to one of these branches turns out to be very close to that of the thermodynamically preferable branch. As a consequence, in a strong magnetic field, the state with the positive spin polarization can be realized as a metastable state in the high-density region in neutron matter, which, under decreasing density, at some threshold density changes to a thermodynamically stable state with the negative spin polarization. © 2009 The American Physical Society.
DOI
10.1103/PhysRevC.80.065801
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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