论文标题
介质有机半导体中的电流噪声
Electric current noise in mesoscopic organic semiconductors
论文作者
论文摘要
我们证明，核自旋波动导致有机半导体的介质样品中的电流噪声，显示出弱场中明显的磁倍率。对于有机磁阻的双极和电子孔机理，当前的噪声谱由与电荷载体骑士场中的核自旋进动相关的高频峰以及与核自旋松弛有关的低频峰。频谱的形状取决于外部磁和射频场，这使人们可以在实验中证明核在磁磁性中的作用。
We demonstrate that nuclear spin fluctuations lead to the electric current noise in the mesoscopic samples of organic semiconductors showing the pronounced magnetoresistance in weak fields. For the bipolaron and electron-hole mechanisms of organic magnetoresistance, the current noise spectrum consists of the high frequency peak related to the nuclear spin precession in the Knight field of the charge carriers and the low frequency peak related to the nuclear spin relaxation. The shape of the spectrum depends on the external magnetic and radiofrequency fields, which allows one to prove the role of nuclei in magnetoresistance experimentally.
