Reduced Hall carrier density in the overdoped strange metal regime of\n cuprate superconductors

2019/09/17 by Carsten Putzke, Putzke, Carsten, S. Benhabib +23 · 5 citations
Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #Theoretical and Computational Physics

paper · pdf · doi:10.48550/arxiv.1909.08102

openalex publication_date 2019/09/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Efforts to understand the microscopic origin of superconductivity in the\ncuprates are dependent on knowledge of the normal state. The Hall number in the\nlow temperature, high field limit n _{rm H}(0) has a particular significance\nbecause within conventional transport theory it is simply related to the number\nof charge carriers, and so its evolution with doping gives crucial information\nabout the nature of the charge transport. Here we report a study of the high\nfield Hall coefficient of the single-layer cuprates\nTl₂Ba₂CuO_6+\δ (Tl2201) and (Pb/La) doped\nBi₂Sr₂CuO_6+\δ (Bi2201) which shows how n _{rm H}(0) evolves in\nthe overdoped, so-called strange metal, regime of cuprates. We find that\nn _{rm H}(0) increases smoothly from p to 1+p, where p is the number of\nholes doped into the parent insulating state, over a wide range of doping. The\nevolution of n _{rm H} correlates with the emergence of the anomalous\nlinear-in-T term in the low-T in-plane resistivity. The results could\nsuggest that quasiparticle decoherence extends to dopings well beyond the\npseudogap regime.\n

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• Questioning the cuprate paradigm -- absence of superfluid density loss in several overdoped cuprates I
• Structural reconstruction as the origin of the cuprate pseudogap
• Superlinear Hall angle and carrier mobility from non-Boltzmann magnetotransport in the spatially disordered Yukawa-SYK model on a square lattice
• Doping dependence of the low temperature planar carrier density in overdoped YBa₂Cu₃O_7-δ

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