Abstract
The honeycomb lattice structure of graphene gives rise to its exceptional electronic properties of linear dispersion relation and its chiral nature of charge carriers. The exceptional electronic properties of graphene stem from linear dispersion relation and chiral nature of charge carries, originating from its honeycomb lattice structure. Here, we address the quantum Hall effect in artificially stacked graphene bilayers and single layer graphene grown by chemical vapor deposition. The quantum Hall plateaus started to appear more than 3 T and became clearer at higher magnetic fields up to 9 T. Shubnikov-de Hass oscillations were manifestly observed in graphene bilayers texture. These unusual plateaus may have been due to the layers interaction in artificially stacked graphene bilayers. Our study initiates the understanding of interactions between artificially stacked graphene layers.
Highlights
The robust electronic properties of graphene stem from linear dispersion relation, containing massless Dirac fermions and chiral nature of charge carriers
We have observed that the quantum Hall effect consisting of various plateaus with non-integer quantized values at 4.2 K, a typical massless Dirac fermions spectrum has observed in a single layer graphene
The bottom layer of graphene has shown in red color honey combs while the top graphene layer has represented by the color blue
Summary
The robust electronic properties of graphene stem from linear dispersion relation, containing massless Dirac fermions and chiral nature of charge carriers. The effect of symmetry breaking of graphene and its significant in electronic transport properties is an enduring topic to identify the various ground states. The electrical transport such as quantum Hall effect in single and Bernal stacked bilayers graphene has been explored to a large extent. We have observed that the quantum Hall effect consisting of various plateaus with non-integer quantized values at 4.2 K, a typical massless Dirac fermions spectrum has observed in a single layer graphene. The Shubnikov-de Hass (SdH) oscillations were observed as well in graphene bilayers texture
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