The Strange Metal State of the Electron-Doped Cuprates

Abstract

An understanding of the high-temperature copper oxide (cuprate) superconductors has eluded the physics community for over thirty years, and represents one of the greatest unsolved problems in condensed matter physics. Particularly enigmatic is the normal state from which superconductivity emerges, so much so that this phase has been dubbed a "strange metal." In this article, we will review recent research into this strange metallic state as realized in the electron-doped cuprates with a focus on their transport properties. The electron-doped compounds differ in several ways from their more thoroughly studied hole-doped counterparts, and understanding these asymmetries of the phase diagram may prove crucial to developing a final theory of the cuprates. Most of the experimental results discussed in this review have yet to be explained and remain an outstanding challenge for theory.

arXiv comment17 pages, 10 figures. submitted to Annual Rev. Cond. Mat. Phys., comments welcome

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• A strange metal in a bosonic system
• Superconductivity in nickel based 112 systems
• Strange metals as ersatz Fermi liquids
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• Twistronics in graphene-based van der Waals structures
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• Ferromagnetic order beyond the superconducting dome in a cuprate superconductor
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• Coherent charge carrier dynamics in the presence of thermal lattice vibrations
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• The Future of the Correlated Electron Problem
• Hall Angle of a Spatially Random Vector Model
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