Correlation between scale-invariant normal state resistivity and superconductivity in an electron-doped cuprate

Abstract

An understanding of the normal state in the high-temperature superconducting cuprates is crucial to the ultimate understanding of the long-standing problem of the origin of the superconductivity itself. This so-called strange metal state is thought to be associated with a quantum critical point (QCP) hidden beneath the superconductivity(1,2). In electron-doped cuprates in contrast to hole-doped cuprates it is possible to access the normal state at very low temperatures and low magnetic fields to study this putative QCP and to probe the T~0 K state of these materials(3,4). We report measurements of the low temperature normal state magnetoresistance (MR) of the n-type cuprate system La2-xCexCuO4 (LCCO) and find that it is characterized by a linear-in-field behavior, which follows a scaling relation with applied field and temperature, for doping (x) above the putative QCP (x= 0.14)(5). This unconventional behavior suggests that magnetic fields probe the same physics that gives rise to the anomalous low-temperature linear-in-T resistivity(4). The magnitude of the linear MR decreases as Tc decreases and goes to zero at the end of the superconducting dome (x ~0.175) above which a conventional quadratic MR is found. These results show that there is a strong correlation between the quantum critical excitations of the strange metal state and the high-Tc superconductivity.

arXiv comment21 pages, 13 figures, comments are welcome

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• Incoherent transport across the strange metal regime of highly overdoped cuprates
• The Strange Metal State of the Electron-Doped Cuprates
• Coexistence of orbital and quantum critical magnetoresistance in FeSe${}_{1-x}$S${}_x$
• Ferromagnetic order beyond the superconducting dome in a cuprate superconductor
• Magnetoresistance scaling, disorder, `hot spots' and the origin of $T$-linear resistivity in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• The strange metal Hall effect connects quantum criticality and superconductivity in an iron-based superconductor
• Single-parameter scaling in the magnetoresistance of optimally doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• $B^2$ to $B$-linear magnetoresistance due to impeded orbital motion
• Possible Scale Invariant Linear Magnetoresistance in Pyrochlore Iridates Bi${}_2$Ir${}_2$O${}_7$
• Strange metal from incoherent bosons
• Anomalous normal state magnetotransport in an electron-doped cuprate
• Thermo-electric Transport of Dyonic Gubser-Rocha Black Holes
• Unveiling the multiband metallic nature of the normal state in nickelate La3Ni2O7
• Ferromagnetic quantum critical point in a locally noncentrosymmetric and nonsymmorphic Kondo metal
• Magnetic Field Effects on the Transport Properties of High-Tc Cuprates
• Impurity and dispersion effects on the linear magnetoresistance in the quantum limit
• Linear magnetoresistance with a universal energy scale in a strong-coupling superconductor
• The Strange Metal State of the high-Tc Cuprates
• The Future of the Correlated Electron Problem
• Magnetic field-tuned quantum criticality in optimally electron-doped cuprate thin films
• Longitudinal Magnetoresistance in YBa${}_2$Cu${}_3$O${}_7$ at High Magnetic Fields of up to 100 T
• Strong correlation between $H$-linear magnetoresistance and strange metal in FeSe superconductor
• Correlation between the strength of low-temperature T-linear normal-state resistivity and $T_{\mathrm{c}}$ in overdoped electron-doped cuprate superconductors
• Stranger than Metals
• $H$-linear magnetoresistance in NbSe${}_2$ due to impeded cyclotron motion
• Interfacial Polarons Driven by Charge Transfer In WSe2/Cuprate Superconductor Systems