arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2108.01256nucl-thcond-mat.supr-con
收藏

中子星中$^3P_2$超流体的自旋极化相

Spin-polarized phases of $^3P_2$ superfluids in neutron stars

Takeshi Mizushima, Shigehiro Yasui, Daisuke Inotani, Muneto Nitta

摘要:

中子星的内部被中子$^3P_2$超流体占据,它是自旋三重态$p$ -波库珀对的凝聚体,具有总角动量$J=2$。本文研究了强磁场作用下中子星内部$^3P_2$超流体的热力学稳定性。利用中子费米面有限尺寸修正的理论,我们证明了$^3P_2$超流体在高温和高磁场下出现自旋极化相,即磁化双轴磁相和铁磁相.这些阶段是错过了在以前的研究中使用准经典近似,其中分散的中子线性周围的费米表面。特别地,铁磁相,即具有完全极化自旋的库珀对中子的凝聚,出现在正常相和双轴超导相之间,增强了$^3P_2$超流体在强磁场下的热力学稳定性.此外,我们提出了增强的Ginzburg-Landau理论,该理论结合了自旋极化$^3P_2$超流相的热力学稳定性。

英文摘要:

The interior of a neutron star is expected to be occupied by a neutron $^3P_2$ superfluid, which is the condensate of spin-triplet $p$-wave Cooper pairs of neutrons with total angular momentum $J=2$. Here we investigate the thermodynamic stability of $^3P_2$ superfluids in a neutron-star interior under a strong magnetic field. Using the theory incorporating the finite size correction of neutron Fermi surface, we show that the spin-polarized phases of $^3P_2$ superfluids, the magnetized biaxial nematic phase and the ferromagnetic phase, appear in high temperatures and high magnetic fields. These phases were missed in the previous studies using the quasiclassical approximation in which dispersions of neutrons are linearized around the Fermi surface. In particular, the ferromagnetic phase, which is the condensation of Cooper-paired neutrons with fully polarized spins, appears between the normal phase and the biaxial nematic phase and enlarge the thermodynamic stability of $^3P_2$ superfluids under strong magnetic fields. Furthermore, we present the augmented Ginzburg-Landau theory that incorporates the thermodynamic stability of spin-polarized $^3P_2$ superfluid phases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑