Enhanced Shubnikov鈥揇e Haas Oscillation in Nitrogen-Doped Graphene

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• 作者：Han-Chun Wu ; Mourad Abid ; Ye-Cun Wu ; Cormac 脫 Coile谩in ; Askar Syrlybekov ; Jun Feng Han ; Cheng Lin Heng ; Huajun Liu ; Mohamed Abid ; Igor Shvets
• 刊名：ACS Nano
• 出版年：2015
• 出版时间：July 28, 2015
• 年：2015
• 卷：9
• 期：7
• 页码：7207-7214
• 全文大小：567K
• ISSN：1936-086X

文摘

N-doped graphene displays many interesting properties compared with pristine graphene, which makes it a potential candidate in many applications. Here, we report that the Shubnikov鈥揹e Haas (SdH) oscillation effect in graphene can be enhanced by N-doping. We show that the amplitude of the SdH oscillation increases with N-doping and reaches around 5k 惟 under a field of 14 T at 10 K for highly N-doped graphene, which is over 1 order of magnitude larger than the value found for pristine graphene devices with the same geometry. Moreover, in contrast to the well-established standard Lifshitz鈥揔osevich theory, the amplitude of the SdH oscillation decreases linearly with increasing temperature and persists up to a temperature of 150 K. Our results also show that the magnetoresistance (MR) in N-doped graphene increases with increasing temperature. Our results may be useful for the application of N-doped graphene in magnetic devices.