Encapsulated graphene-based Hall sensors on foil with increased sensitivity

详细信息    查看全文

• 作者：Zhenxing Wang ; Luca Banszerus ; Martin Otto ; Kenji Watanabe ; Takashi Taniguchi ; Christoph Stampfer and Daniel Neumaier
• 刊名：physica status solidi (b)
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：253
• 期：12
• 页码：2316-2320
• 全文大小：440K
• ISSN：1521-3951

文摘

The encapsulation of graphene-based Hall sensors on foil is shown to be an effective method for improving the performance in terms of higher sensitivity for magnetic field detection. Two types of encapsulation were investigated: a simple encapsulation of graphene with polymethyl methacrylate (PMMA) as a proof of concept and an encapsulation with mechanically exfoliated hexagonal boron nitride (hBN). The Hall sensor with PMMA encapsulation already shows higher sensitivity compared to the one without encapsulation. However, the Hall sensor with graphene encapsulated between two stacks of hBN shows a current and a voltage normalized sensitivity of up to 2270 V/AT and 0.68 V/VT, respectively, which are the highest reported sensitivity values for Hall sensors on foil so far.