Effects of spin doping and spin injection in the luminescence and vibrational spectrum of C60
Effects of spin doping and spin injection in the luminescence and vibrational spectrum of C60
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DOI：
10.1063/1.4885336
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发表时间：
2014-07-14
影响因子：
4
通讯作者：
Cespedes, Oscar
中科院分区：
文献类型：
--
作者：
Moorsom, Timothy;Wheeler, May;Cespedes, Oscar
我们研究了磁性富勒烯混合器件的拉曼光谱和光电发射。对于钴上的C-60层，自旋极化电子转移转移的光发射能量，减少零声子的贡献。混合器件的总发光可以通过磁电极的自旋注入来控制，在室温下的变化为10%-20%。自旋极化电流也改变了分子的拉曼光谱，使某些模式增强了5倍，同时由于自旋相关的跳跃时间和/或增强的分子间相互作用而使其他模式移动了几个波数。这些结果可用于测量分子中的自旋极化或制造磁光和磁振动器件。(C)2014 AIP Publishing LLC.
We have studied the Raman spectrum and photoemission of hybrid magneto-fullerene devices. For C-60 layers on cobalt, the spin polarized electron transfer shifts the photoemission energy, reducing the zero phonon contribution. The total luminescence of hybrid devices can be controlled via spin injection from magnetic electrodes, with changes of the order of 10%-20% at room temperature. Spin polarised currents alter as well the Raman spectrum of the molecules, enhancing some modes by a factor 5 while shifting others by several wavenumbers due to a spin-dependent hopping time and/or enhanced intermolecular interactions. These results can be used to measure spin polarisation in molecules or to fabricate magneto-optic and magneto-vibrational devices. (C) 2014 AIP Publishing LLC.