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Structure and dynamics of a pinned vortex liquid in a superconducting a-Re6Zr thin film

Duhan, R and Sengupta, S and Tomar, R and Basistha, S and Bagwe, V and Dasgupta, C and Raychaudhuri, P (2023) Structure and dynamics of a pinned vortex liquid in a superconducting a-Re6Zr thin film. In: Physical Review B, 108 (18).

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Official URL: https://doi.org/10.1103/PhysRevB.108.L180503


We report the formation of a pinned vortex liquid spanning a very large region of the magnetic field-temperature parameter space in a 5-nm-thick amorphous superconducting RexZr (x�6) (a-ReZr) thin film, using a combination of low-temperature scanning tunneling spectroscopic (STS) imaging and magnetotransport measurements. The nature of the vortex liquid differs significantly from a regular liquid. Analyzing series of STS images captured as a function of time, we observe that the interplay of pinning and intervortex interactions produces a very inhomogeneous state, where some vortices remain static, whereas others move forming a percolating network along which vortices are mobile. With increase in temperature or magnetic field this network becomes denser, eventually encompassing all vortices. Our results provide key insight on the nature of a pinned vortex liquid and some of the peculiarities in the transport properties of ultrathin superconducting films. © 2023 American Physical Society.

Item Type: Journal Article
Publication: Physical Review B
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to Author.
Keywords: Magnetic fields; Superconducting films; Temperature; Ultrathin films, Field temperature; Large regions; Lows-temperatures; Magnetic-field; Parameter spaces; Spectroscopic imaging; Structure and dynamics; Temperature parameters; Thin-films; Vortex liquid, Vortex flow
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 28 Feb 2024 09:50
Last Modified: 28 Feb 2024 09:50
URI: https://eprints.iisc.ac.in/id/eprint/83661

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