Magnetic excitations in the ferromagnetic superconductor UGe 2 under pressure
Magnetic excitations in the ferromagnetic superconductor UGe 2 under pressure
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压力下铁磁超导体 UGe 2 中的磁激发
DOI：
10.1088/1742-6596/568/4/042016
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Kepa M
中科院分区：
文献类型：
--
作者：
Kepa M
在 10-16 kbar 的压力下， UGe 2 中铁磁性和超导性共存。在这里，相等的自旋电子配对以给出自旋三重态，但配对机制仍未经过实验验证。这里提出的工作试图验证与铁磁态内磁转变相关的纵向磁波动是否可能是电子配对的原因。我们证明这些波动的能量尺度必须小于与居里温度下的二级相变相关的能量尺度。此外，居里温度下波动的能量尺度作为压力的函数没有显着变化。
Ferromagnetism and superconductivity coexist in UGe 2 under pressures in the range of 10-16 kbar. Here, equal spin electrons are paired to give a spin triplet state but the pairing mechanism is still not verified experimentally. The work presented here attempts to verify whether the longitudinal magnetic fluctuations associated with a magnetic transition within the ferromagnetic state might be responsible for the electron pairing. We show that the energy scale of these fluctuations must be smaller than those associated with the second order phase transition at the Curie temperature. Furthermore, there is no significant change of the energy scale of the fluctuations at the Curie temperature as a function of pressure.