Ultra-sensitive Hall sensors based on graphene encapsulated in hexagonal boron nitride

By J. Dauber, A. Sagade, M. Oellers, Kenji Watanabe, Takashi Taniguchi, D. Neumaier, Christoph Stampfer. 2015

139 citations recorded by the source corpus.

The encapsulation of graphene in hexagonal boron nitride provides graphene on substrate with excellent material quality. Here, we present the fabrication and characterization of Hall sensor elements based on graphene boron nitride heterostructures, where we gain from high mobility and low charge carrier density at room temperature. We show a detailed device characterization including Hall effect measurements under vacuum and ambient conditions. We achieve a current- and voltage-related sensitivity of up to 5700 V/AT and 3 V/VT, respectively, outpacing state-of-the-art silicon and III/V Hall sensor devices. Finally, we extract a magnetic resolution limited by low frequency electric noise of less than 50 nT/ Hz making our graphene sensors highly interesting for industrial applications.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/d1f26a875cc70531f22e11a0497928690eddd1ed

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

In Materials Chemistry

Citations in the corpus

Water on graphene: review of recent progress (2018, background): “Most importantly, because of its true 2D nature and high surface-to-volume ratio, graphene has already been used as a sensing material for gases [5], bio [6] and magnetic fields [7].”
Electrical characterization of 2D materials-based field-effect transistors (2020, background): “Although it is not often done for 2D materials, the sample (mostly graphene) can also be measured while placed atop a permanent magnet that is flipped between measurements to give a positive and negative B-field [111, 112].”
The hot pick-up technique for batch assembly of van der Waals heterostructures (2016, unknown): “The perspectives are astounding, with applications ranging from electronics 1,2 , photovoltaics 3,4 and sensing 5,6 through to memory storage 7 with the intriguing possibility of increased performance and a wide range of functionalities on ﬂexible, transparent substrates 8,9 .”