Generic strange-metal behaviour of overdoped cuprates

Hussey, N. E.; Gordon-Moys, H; Kokalj, Jure; McKenzie, Ross H.

doi:10.1088/1742-6596/449/1/012004

Cited by 43 publications

(46 citation statements)

References 34 publications

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“…ρ ∼ T + T 2 , very similar to what is observed in the organic superconductor (TMTSF)2PF6 above its AF QCP (116). Tl2201 exhibits a similar evolution (24,29,23,117), showing that this is likely to be a generic behavior in hole-doped cuprates. ADMR data in Tl2201 have been modelled with two scattering rates: a T 2 rate which is isotropic around the FS, and an anisotropic T -linear rate that is maximal in the antinodal directions (118).…”

Section: Strange Metalsupporting

confidence: 70%

The Remarkable Underlying Ground States of Cuprate Superconductors

Proust

Taillefer

2019

Annu. Rev. Condens. Matter Phys.

316

273

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Cuprates exhibit exceptionally strong superconductivity. To understand why, it is essential to elucidate the nature of the electronic interactions that cause pairing. Superconductivity occurs on the backdrop of several underlying electronic phases, including a doped Mott insulator at low doping, a strange metal at high doping, and an enigmatic pseudogap phase in between -inside which a phase of charge-densitywave order appears. In this Article, we aim to shed light on the nature of these remarkable phases by focusing on the limit as T → 0, where experimental signatures and theoretical statements become sharper. We therefore survey the ground state properties of cuprates once superconductivity has been removed by the application of a magnetic field, and distill their key universal features. arXiv:1807.05074v1 [cond-mat.supr-con] 13 Jul 2018Phase diagram of hole-doped cuprates. a) In zero field, superconductivity exists in a dome below Tc (dashed line). When it is removed by a magnetic field, various underlying ground states are revealed: 1) Doped Mott insulator with antiferromagnetic order, on the far left (brown, AF); 2) Pseudogap (PG) phase below a temperature T (yellow, PG), ending at a T = 0 critical point p (red dot); 3) Charge-density-wave phase (blue, CDW), contained inside the pseudogap phase; 4) a strange metal just above p (white region), which gives way to a Fermi liquid at highest doping (grey region). b) Phase diagram of Nd-LSCO, with the pseudogap temperature T measured by resistivity (circles) and ARPES (square; panels c, d), ending at the critical point p (from ref. (4)). c) ARPES spectra showing the pseudogap in Nd-LSCO measured just above Tc at four dopings, as indicated (5). The pseudogap is seen to close between p = 0.20 and p = 0.24, consistent with p = 0.23. d) ARPES spectra at p = 0.20 vs temperature (5). The pseudogap is seen to close at T = 75 K (square in panel b).

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Section: Strange Metalsupporting

confidence: 70%

The Remarkable Underlying Ground States of Cuprate Superconductors

Proust

Taillefer

2019

Annu. Rev. Condens. Matter Phys.

316

273

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“…Measurements of A as a function of carrier density have been reported for several oxides, including cuprates [51][52][53][54], vanadates [55], bulk, doped SrTiO 3 [56], and SrTiO 3 quantum wells [56,57]. In all cases, A ~ 1/N, consistent with expectations from the Drude model, see equation 3.…”

Section: Longitudinal Resistancesupporting

confidence: 68%

Non-Fermi liquids in oxide heterostructures

Stemmer

Allen

2018

Rep. Prog. Phys.

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Understanding the anomalous transport properties of strongly correlated materials is one of the most formidable challenges in condensed matter physics. For example, one encounters metal-insulator transitions, deviations from Landau Fermi liquid behavior, longitudinal and Hall scattering rate separation, a pseudogap phase, and bad metal behavior. These properties have been studied extensively in bulk materials, such as the unconventional superconductors and heavy fermion systems. Oxide heterostructures have recently emerged as new platforms to probe, control, and understand strong correlation phenomena. This article focuses on unconventional transport phenomena in oxide thin film systems. We use specific systems as examples, namely charge carriers in SrTiO layers and interfaces with SrTiO, and strained rare earth nickelate thin films. While doped SrTiO layers appear to be a well behaved, though complex, electron gas or Fermi liquid, the rare earth nickelates are a highly correlated electron system that may be classified as a non-Fermi liquid. We discuss insights into the underlying physics that can be gained from studying the emergence of non-Fermi liquid behavior as a function of the heterostructure parameters. We also discuss the role of lattice symmetry and disorder in phenomena such as metal-insulator transitions in strongly correlated heterostructures.

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“…In reality, the normal state transport properties of all OD cuprates, including Tl2201, are far from conventional. This so-called 'strange metal' regime has three notable characteristics: (i) a ubiquitous non-FL (T -linear) component in the in-plane resistivity ρ ab (T ) at low T [10][11][12], whose coefficient α(0) scales with T c and is consistent with a scattering rate at the Planckian dissipation limit ħ h/τ ∼ k B T [12,13]; (ii) a Hall number n H (0) deduced from the low-T Hall effect that does not follow the expected 'Luttinger' 1 + p line but instead drops monotonically towards p near OP doping [14] and (iii) a H-linear magnetoresistance (MR) at high field strengths [15] that exhibits H/T scaling [16] and is also insensitive to both field orientation and impurity scattering rate [16] (for more details, see the introduction to appendix A).…”

Section: Introductionmentioning

confidence: 99%

Possible superconductivity from incoherent carriers in overdoped cuprates

et al. 2021

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There is now compelling evidence that the normal state of superconducting overdoped cuprates is a strange metal comprising two distinct charge sectors, one governed by coherent quasiparticle excitations, the other seemingly incoherent and characterized by non-quasiparticle (Planckian) dissipation. The zero-temperature superfluid density n_s(0)ns(0) of overdoped cuprates exhibits an anomalous depletion with increased hole doping pp, falling to zero at the edge of the superconducting dome. Over the same doping range, the effective zero-temperature Hall number n_{\rm H}(0) transitions from pp to 1 + pp. By taking into account the presence of these two charge sectors, we demonstrate that in the overdoped cuprates Tl_22Ba_22CuO_{6+\delta}6+δ and La_{2-x}2−xSr_xxCuO_44, the growth in n_s(0)ns(0) as pp is decreased from the overdoped side may be compensated by the loss of carriers in the coherent sector. Such a correspondence is contrary to expectations from conventional BCS theory and implies that superconductivity in overdoped cuprates emerges uniquely from the sector that exhibits incoherent transport in the normal state.

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Generic strange-metal behaviour of overdoped cuprates

Cited by 43 publications

References 34 publications

The Remarkable Underlying Ground States of Cuprate Superconductors

The Remarkable Underlying Ground States of Cuprate Superconductors

Non-Fermi liquids in oxide heterostructures

Possible superconductivity from incoherent carriers in overdoped cuprates

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