Strong enhancement of superconducting Tc in ferromagnetic phases -: art. no. 127003
Strong enhancement of superconducting Tc in ferromagnetic phases -: art. no. 127003
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DOI：
10.1103/physrevlett.87.127003
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发表时间：
2001-09-17
影响因子：
8.6
通讯作者：
Narayanan, R
中科院分区：
文献类型：
--
作者：
Kirkpatrick, TR;Belitz, D;Narayanan, R
结果表明，在海森堡铁磁相中，由于磁振子与纵向磁化率的耦合，自旋涨落介导的自旋三重态纵波超导的临界温度一般要比顺磁相高得多。在非常干净的海森堡磁体中，低温铁磁转变倾向于一阶，这定性地解释了最近在UGe2中观察到的相图。
It is shown that the critical temperature for spin-triplet, p-wave superconductivity mediated by spin fluctuations is generically much higher in a Heisenberg ferromagnetic phase than in a paramagnetic one, due to the coupling of the magnons to the longitudinal magnetic susceptibility. Together with the tendency of the low-temperature ferromagnetic transition in very clean Heisenberg magnets to be of first order, this qualitatively explains the phase diagram recently observed in UGe2.