Bosonic topological insulator intermediate state in the superconductor-insulator transition
Abstract
A low-temperature intervening metallic regime arising in the two-dimensional superconductor-insulator transition challenges our understanding of electronic fluids. Here we develop a gauge theory revealing that this emergent anomalous metal is a bosonic topological insulator where bulk transport is suppressed by mutual statistics interactions between out-of-condensate Cooper pairs and vortices and the longitudinal conductivity is mediated by symmetry-protected gapless edge modes. We explore the magnetic-field-driven superconductor-insulator transition in a niobium titanium nitride device and find marked signatures of a bosonic topological insulator behavior of the intervening regime with the saturating resistance. The observed superconductor-anomalous metal and insulator-anomalous metal dual phase transitions exhibit quantum Berezinskii-Kosterlitz-Thouless criticality in accord with the gauge theory.
Additional Information
© 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Received 12 April 2020, Accepted 12 May 2020, Available online 19 May 2020. We are delighted to thank Thomas Proslier for preparing NbTiN samples used in the experiments and Tom Rosenbaum for valuable discussions. M.C.D. thanks CERN, where she completed this work, for kind hospitality. S.V.P. is grateful to Tatyana Baturina for valuable contribution at the initial stage of work on NbTiN films. The work at Argonne (V.M.V.) was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, the work at UOC (partially V.M.V) was supported by the NSF grant DMR-1809188. The work on transport measurements at Novosibirsk (A.Yu.M. and S.V.P.) was supported by Russian Science Foundation project No. 18-72-10056. The work 5 of S.V.P. on the analysis of experimental data was supported by RFBR project No. 18-32-00718 mol-a. The work by Y.K. was supported by FAPESP, CNPq and AFOSR Grant FA9550-17-1-0132. The work at Caltech (D.S.) was supported by National Science Foundation Grant No. DMR-1606858. Data availability: The original experimental data of this article are available upon request. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Attached Files
Published - 1-s2.0-S0375960120304370-main.pdf
Supplemental Material - 1-s2.0-S0375960120304370-mmc1.pdf
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Additional details
- Eprint ID
- 103308
- Resolver ID
- CaltechAUTHORS:20200519-100024580
- Department of Energy (DOE)
- NSF
- DMR-1809188
- Russian Science Foundation
- 18-72-10056
- Russian Foundation for Basic Research
- 18-32-00718 mol-a
- Fundação de Amparo à Pesquisa do Estado de Sao Paulo (FAPESP)
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Air Force Office of Scientific Research (AFOSR)
- FA9550-17-1-0132
- NSF
- DMR-1606858
- Created
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2020-05-19Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field