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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Observation of the predicted potential barrier at the graphene/transition metal interface
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Observation of the predicted potential barrier at the graphene/transition metal interface

机译:观察石墨烯/过渡金属界面的预测势垒

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摘要

To verify the prediction of a potential barrier (similar to 0.4 eV) as a result of charge transfer from a transition metal (TM) to graphene at the graphene/TM interface, in the present work Fe atoms are intercalated in between the few-layer graphene. A diode-like behavior with cut-in voltage (0.41 V-0.65 V) and rectification ratio 11 at 1.7 V is observed depending on the Fe concentration. The cut-in voltage decreases with an increase in both temperature and magnetic field because of better charge sharing across the covalent bond formed between Fe and graphene. This tuning of charge sharing under a magnetic field exhibits a remarkable effect of the magneto-dielectric property with a 2597% change in dielectric permittivity at 1.8 T. We believe that the material exhibiting diode-like behavior with a large rectification ratio and a giant magneto-dielectric effect has potential applications in magneto-electronic devices.
机译:为了验证由于电荷从过渡金属(TM)转移到石墨烯/ TM界面上的石墨烯而导致的势垒(类似于0.4 eV)的预测,在本工作中,Fe原子插入了几层之间石墨烯。根据Fe的浓度,观察到二极管状的行为,具有截止电压(0.41 V-0.65 V)和整流比11为1.7V。由于在Fe和石墨烯之间形成的共价键之间更好的电荷共享,因此切入电压随温度和磁场的增加而降低。磁场下电荷共享的这种调整表现出了显着的磁电介质性能,在1.8 T时介电常数发生了2597%的变化。我们相信该材料具有大的整流比和巨大的磁电势,表现出类似二极管的行为-介电效应在磁电子器件中具有潜在的应用。

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