Tiwari, P and Sahani, D and Chakraborty, A and Das, K and Watanabe, K and Taniguchi, T and Agarwal, A and Bid, A (2023) Observation of the Time-Reversal Symmetric Hall Effect in Graphene-WSe2 Heterostructures at Room Temperature. In: Nano Letters, 23 (15). pp. 6792-6798.
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Abstract
In this Letter, we provide experimental evidence of the time-reversal symmetric Hall effect in a mesoscopic system, namely, high-mobility graphene-WSe2 heterostructures. This linear, dissipative Hall effect, whose sign depends on the sign of the charge carriers, persists up to room temperature. The magnitude and the sign of the Hall signal can be tuned using an external perpendicular electric field. Our joint experimental and theoretical study establishes that the strain induced by lattice mismatch, or alignment angle inhomogeneity, produces anisotropic bands in graphene while simultaneously breaking the inversion symmetry. The band anisotropy and reduced spatial symmetry lead to the appearance of a time-reversal symmetric Hall effect. Our study establishes graphene-transition metal dichalcogenide-based heterostructures as an excellent platform for studying the effects of broken symmetry on the physical properties of band-engineered two-dimensional systems. © 2023 American Chemical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Nano Letters |
| Publisher: | American Chemical Society |
| Additional Information: | The copyright for this article belongs to authors. |
| Keywords: | Electric fields; Graphene; Hall mobility; Lattice mismatch; Selenium compounds; Transition metals; Tungsten compounds, Band anisotropy; Experimental evidence; Hall signal; High mobility; Mesoscopic systems; Symmetric hall effect; Symmetrics; Theoretical study; Time reversal symmetries; Time-reversal, Anisotropy |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 14 Dec 2024 20:15 |
| Last Modified: | 14 Dec 2024 20:15 |
| URI: | http://eprints.iisc.ac.in/id/eprint/85519 |
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