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Superconducting correlations above T-c in the pseudogap state of Bi2Sr2CaCu2O8+delta cuprates revealed by angular-dependent magnetotunneling
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 3
2016 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 94, no 22, 220501Article in journal (Refereed) Published
Abstract [en]

We present an angular-dependent magnetotunneling technique, which facilitates unambiguous separation of superconducting (supporting circulating screening currents) and nonsuperconducting (not supporting screening currents) contributions to the pseudogap phenomenon in layered Bi2Sr2CaCu2O8+delta cuprates. Our data indicate persistence of superconducting correlations at temperatures up to 1.5T(c) in a form of both phase and amplitude fluctuations of the superconducting order parameter. However, despite a profound fluctuations region, only a small fraction of the pseudogap spectrum is caused by superconducting correlations, while the dominating part comes from a competing nonsuperconducting order, which does not support circulating orbital currents.

Place, publisher, year, edition, pages
2016. Vol. 94, no 22, 220501
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-137571DOI: 10.1103/PhysRevB.94.220501ISI: 000389502500001OAI: oai:DiVA.org:su-137571DiVA: diva2:1063825
Available from: 2017-01-11 Created: 2017-01-09 Last updated: 2017-01-11Bibliographically approved

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Jacobs, ThorstenKatterwe, Sven-OlofKrasnov, Vladimir M.
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