Phonon-mediated magneto-resonances in biased graphene layers

Pandey, M and Watanabe, K and Taniguchi, T and Raghavan, S and Chandni, U (2024) Phonon-mediated magneto-resonances in biased graphene layers. In: 2D Materials, 11 (1).

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Abstract

We explore the non-equilibrium transport regime in graphene using a large dc current in combination with a perpendicular magnetic field. The strong in-plane Hall field generated in the graphene channel results in Landau levels that are tilted spatially. The energy of cyclotron orbits in the bulk varies as a function of the spatial position of the guiding center, enabling us to observe a series of compelling features. While Shubnikov-de Haas oscillations are predictably suppressed in the presence of the Hall field, a set of fresh magneto resistance oscillations emerge near the charge neutrality point as a function of dc current. Two branches of oscillations with linear dispersions are evident as we vary carrier density and dc current, the velocities of which closely resemble the transverse acoustic (TA) and longitudinal acoustic (LA) phonon modes, suggestive of phonon-assisted intra-Landau level transitions between adjacent cyclotron orbits. Our results offer unique possibilities to explore non-equilibrium phenomena in two-dimensional materials and van der Waals heterostructures. © 2023 IOP Publishing Ltd.

Item Type:	Journal Article
Publication:	2D Materials
Publisher:	Institute of Physics
Additional Information:	The copyright for this article belongs to Institute of Physics.
Keywords:	Cyclotrons; Magnetos; Phonons; Van der Waals forces, Acoustic phonons; Acoustic-phonons; Cyclotron orbits; Dc current; Drift velocities; Hall field; Intra-landau level transition; Landau levels; Level transition; Non-equilibrium phenomena, Graphene
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	28 Feb 2024 05:02
Last Modified:	28 Feb 2024 05:02
URI:	https://eprints.iisc.ac.in/id/eprint/83618

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