Hole pocket–driven superconductivity and its universal features in the electron-doped cuprates

Li, Yangmu and Tabis, W. and Tang, Y. and Jaroszynski, J. and Barišić, Neven and Greven, M. (2019) Hole pocket–driven superconductivity and its universal features in the electron-doped cuprates. Science Advances, 5 (2). eaap7349-7. ISSN 2375-2548

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Abstract

After three decades of intensive research attention, the emergence of superconductivity in cuprates remains an unsolved puzzle. One major challenge has been to arrive at a satisfactory understanding of the unusual metallic “normal state” from which the superconducting state emerges upon cooling. A second challenge has been to achieve a unified understanding of hole- and electron-doped compounds. Here, we report detailed magnetoresistance measurements for the archetypal electron-doped cuprate Nd2−xCexCuO4+d that, in combina-tion with previous data, provide crucial links between the normal and superconducting states and between the electron- and hole-doped parts of the phase diagram. The characteristics of the normal state (magnetoresistance, quantum oscillations, and Hall coefficient) and those of the superconducting state (superfluid density and upper critical field) consistently indicate two-band (electron and hole) features and point to hole pocket–driven super-conductivity in these nominally electron-doped materials. We show that the approximate Uemura scaling be-tween the superconducting transition temperature and the superfluid density found for hole-doped cuprates also holds for the small hole component of the superfluid density in electron-doped cuprates.

Item Type: Article
Date: 2019
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
Divisions: Faculty of Science > Department of Physics
Publisher: American Association for the Advancement of Science
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 26 Mar 2019 10:17
Last Modified: 26 Mar 2019 10:17
URI: http://digre.pmf.unizg.hr/id/eprint/5892

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