Transport signatures of fragile glass dynamics in the melting of the two-dimensional vortex lattice

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Transport signatures of fragile glass dynamics in the melting of the two-dimensional vortex lattice

I. Maccari, Bal K. Pokharel, J. Terzic, Surajit Dutta, J. Jesudasan, Pratap Raychaudhuri, J. Lorenzana, C. De Michele, C. Castellani, L. Benfatto, and Dragana Popović

Phys. Rev. B 107, 014509 – Published 18 January 2023

Abstract

In a two-dimensional superconducting vortex lattice, the melting from the solid to the isotropic liquid can occur via an intermediate phase that retains orientational correlations. The effect of such correlations on transport and their interplay with the quenched disorder remain open questions. We perform magnetotransport measurements in a wide range of temperatures and magnetic fields on a weakly pinned two-dimensional vortex system in amorphous MoGe films. While at high fields, where quenched disorder dominates, we recover the typical strong-glass behavior of a vortex liquid, at low fields the resistivity shows a clear crossover to a fragile vortex glass. Our findings, supported by numerical simulations, suggest that this is a signature of heterogeneous dynamics that arises from the presence of orientational correlations.

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Received 18 June 2022
Accepted 4 January 2023

DOI:https://doi.org/10.1103/PhysRevB.107.014509

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by Bibsam.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Topological phase transition Vortex lattices

Thin films Two-dimensional electron system

Monte Carlo methods Resistivity measurements

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

I. Maccari ^1,*,†, Bal K. Pokharel ^2,3,*,‡, J. Terzic ^2,4, Surajit Dutta⁵, J. Jesudasan⁵, Pratap Raychaudhuri⁵, J. Lorenzana ⁶, C. De Michele ⁷, C. Castellani ^7,6, L. Benfatto ^7,6,§, and Dragana Popović ^2,3,¶

¹Department of Physics, Stockholm University, 106 91 Stockholm, Sweden
²National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
³Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
⁴Department of Physics and Astronomy, Western Kentucky University, Bowling Green, Kentucky 42101, USA
⁵Tata Institute of Fundamental Research, Homi Bhabha Rd, Colaba, Mumbai 400005, India
⁶Institute for Complex Systems (ISC-CNR), UOS Sapienza, P.le A. Moro 5, 00185 Rome, Italy
⁷Department of Physics, Sapienza University of Rome, P.le A. Moro 2, 00185 Rome, Italy

^*These authors contributed equally to this work.
^†ilaria.maccari@fysik.su.se
^‡bkp16@fsu.edu
^§lara.benfatto@roma1.infi.it
^¶dragana@magnet.fsu.edu

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Issue

Vol. 107, Iss. 1 — 1 January 2023

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