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Charge Berezinskii-Kosterlitz-Thouless transition in superconducting NbTiN films

Mironov, Alexey Yu. and Silevitch, Daniel M. and Proslier, Thomas and Postolova, Svetlana V. and Burdastyh, Maria V. and Gutakovskii, Anton K. and Rosenbaum, Thomas F. and Vinokur, Valerii V. and Baturina, Tatyana I. (2018) Charge Berezinskii-Kosterlitz-Thouless transition in superconducting NbTiN films. Scientific Reports, 8 . Art. No. 4082. ISSN 2045-2322. PMCID PMC5840303. doi:10.1038/s41598-018-22451-1.

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Three decades after the prediction of charge-vortex duality in the critical vicinity of the two-dimensional superconductor-insulator transition (SIT), one of the fundamental implications of this duality—the charge Berezinskii-Kosterlitz-Thouless (BKT) transition that should occur on the insulating side of the SIT—has remained unobserved. The dual picture of the process points to the existence of a superinsulating state endowed with zero conductance at finite temperature. Here, we report the observation of the charge BKT transition on the insulating side of the SIT in 10 nm thick NbTiN films, identified by the BKT critical behavior of the temperature and magnetic field dependent resistance, and map out the magnetic-field dependence of the critical temperature of the charge BKT transition. Finally, we ascertain the effects of the finite electrostatic screening length and its divergence at the magnetic field-tuned approach to the superconductor-insulator transition.

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URLURL TypeDescription CentralArticle
Mironov, Alexey Yu.0000-0003-4148-0752
Silevitch, Daniel M.0000-0002-6347-3513
Proslier, Thomas0000-0002-6273-6772
Vinokur, Valerii V.0000-0002-0977-3515
Additional Information:© 2018 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit Received: 04 January 2018; Accepted: 22 February 2018; Published online: 06 March 2018. This work was supported by the Ministry of Education and Science of the Russian Federation, by the Grant of the President RF, project No MK-4628.2016.2 (A.Yu.M., S.V.P., M.V.B., and A.K.G.). The high resolution electron microscopy was performed with support of RSF, project No 14-22-00143. The work at Caltech was supported by National Science Foundation Grant No. DMR-1606858 (D.M.S. and T.F.R.). The work at Argonne was supported by the U.S. Department of Energy, Office of Science, Materials Sciences and Engineering Division (V.M.V., T.P., and visits of T.I.B.). T.I.B. also acknowledges support by the Alexander von Humboldt Foundation and from the Consejeria de Educacian, Cultura y Deporte (Comunidad de Madrid) through the talent attraction program, Ref. 2016-T3/IND-1839. A.Yu.M. and T.I.B. were also supported from the Argonne-University of Chicago collaborative seed grant. We are delighted to thank E. Shimshoni for illuminating discusions. Author Contributions: T.I.B., V.M.V., and T.F.R. conceived the project and initiated this work; the films were synthesized by T.P.; A.Yu.M., D.M.S., S.V.P., M.V.B., and T.I.B. carried out the experiments; A.K.G. performed high resolution electron microscopy; A.Yu.M., D.M.S., T.F.R., V.M.V., and T.I.B. analyzed the data. All authors discussed the results and contributed in writing the manuscript. The authors declare no competing interests.
Funding AgencyGrant Number
Ministry of Education and Science of the Russian FederationMK-4628.2016.2
Russian Science Foundation14-22-00143
Department of Energy (DOE)UNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Consejeria de Educacian, Cultura y Deporte (Comunidad de Madrid)2016-T3/IND-1839
University of ChicagoUNSPECIFIED
Subject Keywords:Phase transitions and critical phenomena; Superconducting properties and materials
PubMed Central ID:PMC5840303
Record Number:CaltechAUTHORS:20180312-092527791
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85241
Deposited By: Tony Diaz
Deposited On:12 Mar 2018 17:22
Last Modified:15 Mar 2022 20:51

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