Correlated carrier dynamics in a superconducting van der Waals heterostructure

Baidya, P and Bagwe, V and Raychaudhuri, P and Bid, A (2022) Correlated carrier dynamics in a superconducting van der Waals heterostructure. In: Applied Physics Letters, 120 (18).

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Abstract

A study of Berezinskii-Kosterlitz-Thouless transitions in clean, layered two-dimensional superconductors promises to provide insight into a host of novel phenomena like re-entrant vortex-dynamics, underlying unconventional metallic phases, and topological superconductivity. In this Letter, we report the study of charge carrier dynamics in a novel two-dimensional superconducting van der Waals heterostructure comprising of monolayer MoS2 and few-layer NbSe2 (⼠15 nm). Using low-frequency conductance fluctuation spectroscopy, we show that the superconducting transition in the system is percolative. We present a phenomenological picture of different phases across the transition correlating with the evaluated noise. The analysis of the higher order statistics of fluctuation reveals non-Gaussian components around the transition indicative of long-range correlation in the system. © 2022 Author(s).

Item Type:	Journal Article
Publication:	Applied Physics Letters
Publisher:	American Institute of Physics Inc.
Additional Information:	The copyright for this article belongs to American Institute of Physics Inc.
Keywords:	Higher order statistics; Layered semiconductors; Molybdenum compounds; Niobium compounds; Selenium compounds; Sulfur compounds; Vortex flow, Berezinskii-Kosterlitz-Thouless transition; Carrier dynamics; Charge carrier dynamics; Conductance fluctuation; Lower frequencies; Metallic phase; Two-dimensional; Two-dimensional superconductors; Van der Waal; Vortex dynamics, Van der Waals forces
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	27 May 2022 05:43
Last Modified:	27 May 2022 05:43
URI:	https://eprints.iisc.ac.in/id/eprint/72734

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