Interband scattering across the Lifshitz transition in WTe2

Sruthi, S and Narang, DS and Vishnubhotla, P and Bera, A and Kalimuddin, S and Watanabe, K and Taniguchi, T and Mondal, M and Bid, A (2022) Interband scattering across the Lifshitz transition in WTe2. In: Physical Review B, 106 (11).

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Abstract

In this paper, we investigate the resistance fluctuations near the Lifshitz transition in WTe2 devices. We identify the Lifshitz transition from electrical and thermal transport studies. The band structure obtained at low temperatures using quantum oscillation measurements consists of two hole pockets and two electron pockets at the Fermi energy, the hole pockets vanish above the Lifshitz transition temperature. The electrical noise shows a conspicuous peak near the Lifshitz transition temperature; we establish this noise to be arising from charge carrier scattering between the Weyl nodes and proximate areas of the bands. Our comparative study of the noise on WTe2 devices fabricated on substrates with different scattering mechanisms elucidates the effect of interband scattering on the physics of Weyl semimetals.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	The copyright for this article belongs to American Physical Society.
Keywords:	Tellurium compounds, Electrical noise; Electrical transport; Electron pockets; Interband scattering; Lifshitz transition; Lows-temperatures; Oscillation measurements; Quantum oscillations; Resistance fluctuation; Thermal transport, Temperature
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	27 Oct 2022 09:25
Last Modified:	27 Oct 2022 09:25
URI:	https://eprints.iisc.ac.in/id/eprint/77640

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