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arXiv 0704.0466cond-mat.supr-concond-mat.str-el
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MgB2超导体中导电电子自旋-晶格弛豫时间

Conduction electron spin-lattice relaxation time in the MgB2 superconductor

F. Simon, F. Murányi, T. Fehér, A. Jánossy, L. Forró, C. Petrovic, S. L. Bud'ko, P. C. Canfield

摘要:

测量了MgB $_2$中传导电子的自旋-晶格弛豫时间$T_{1}$随温度和磁场的变化。该方法是基于检测的$z$组件的传导电子磁化强度的电子自旋共振条件下的振幅调制的微波激发。在0.32 T下测量低于$T_c$的$T_{1}$,允许从MgB $_{2}$的两个费米面解开贡献,因为该场仅在具有$π$对称性的费米面部分上恢复正常态。

英文摘要:

The spin-lattice relaxation time, $T_{1}$, of conduction electrons is measured as a function of temperature and magnetic field in MgB$_2$. The method is based on the detection of the $z$ component of the conduction electron magnetization under electron spin resonance conditions with amplitude modulated microwave excitation. Measurement of $T_{1}$ below $T_c$ at 0.32 T allows to disentangle contributions from the two Fermi surfaces of MgB$_{2}$ as this field restores normal state on the Fermi surface part with $π$ symmetry only.

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。

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