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Thurston, T. R.; Gehring, P. M.; Shirane, G.; Birgeneau, R. J.; Kastner, M. A.; Endoh, Y.; Matsuda, M.; Yamada, K.; Kojima, H.; Tanaka, Isao

doi:10.1103/physrevb.46.9128

Cited by 155 publications

(79 citation statements)

References 11 publications

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“…Upon further introduction of holes, a superconducting ground state is obtained for x ∼ 0.05 18,19 . The superconducting T C increases with increased doping and an optimally high superconducting T C is achieved near x ∼ 0.17 [20][21][22] .…”

Section: Introductionmentioning

confidence: 98%

Two-dimensional incommensurate and three-dimensional commensurate magnetic order and fluctuations in La2−xBaxCuO

et al. 2013

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We present neutron scattering measurements on single crystals of lightly doped La2−xBaxCuO4, with 0 ≤ x ≤ 0.035. These reveal the evolution of the magnetism in this prototypical doped Mott insulator from a three dimensional (3D) commensurate (C) antiferromagnetic ground state, which orders at a relatively high TN , to a two dimensional (2D) incommensurate (IC) ground state with finite ranged static correlations, which appear below a relatively low effective TN . At low temperatures, the 2D IC magnetism co-exists with the 3D C magnetism for doping concentrations as low as ∼ 0.0125. We find no signal of a 3D C magnetic ground state by x ∼ 0.025, consistent with the upper limit of x ∼ 0.02 observed in the sister family of doped Mott insulators, La2−xSrxCuO4. The 2D IC ground states observed for 0.0125 ≤ x ≤ 0.035 are diagonal, and are rotated by 45 degrees within the orthorhombic basal plane compared with those previously reported for samples with superconducting ground states: La2−xBaxCuO4, with 0.05 ≤ x ≤ 0.095. We construct a phase diagram based solely on magnetic order parameter measurements, which displays much of the complexity of standard high temperature superconductivity phase diagrams discussed in the literature. Analysis of high energy-resolution inelastic neutron scattering at moderately low temperatures shows a progressive depletion of the very low energy dynamic magnetic susceptibility as x increases from 0.0125 to 0.035. This low energy, dynamic susceptibility falls off with increasing temperature on a scale much higher than the effective 2D IC TN appropriate to these materials. Appreciable dynamic 2D IC magnetic fluctuations inhabit much of the "pseudogap" regime of the phase diagram.

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Section: Introductionmentioning

confidence: 98%

Two-dimensional incommensurate and three-dimensional commensurate magnetic order and fluctuations in La2−xBaxCuO

et al. 2013

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“…Low frequency spin fluctuations with relatively sharp peaks at incommensurate wave vectors were detected many years ago in inelastic neutron scattering studies (Cheong et al, 1991;Thurston et al, 1989Thurston et al, , 1992 of "optimally-doped" (x ≈ 0.15, T c ∼ 38 K) La 2−x Sr x CuO 4 . However, not until the discovery (Tranquada et al, 1995b) of "honest" stripe-ordered phases in the closely related compound La 1.6−x Nd 0.4 Sr x CuO 4 was the interpretation of these peaks as being due to stripe fluctuations made unambiguously clear.…”

Section: Regarding Experiments In the Cupratesmentioning

confidence: 99%

How to detect fluctuating stripes in the high-temperature superconductors

et al. 2003

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We discuss fluctuating order in a quantum disordered phase proximate to a quantum critical point, with particular emphasis on fluctuating stripe order. Optimal strategies for extracting information concerning such local order from experiments are derived with emphasis on neutron scattering and scanning tunneling microscopy. These ideas are tested by application to two model systemsthe exactly solvable one dimensional electron gas with an impurity, and a weakly-interacting 2D electron gas. We extensively review experiments on the cuprate high-temperature superconductors which can be analyzed using these strategies. We adduce evidence that stripe correlations are widespread in the cuprates. Finally, we compare and contrast the advantages of two limiting perspectives on the high-temperature superconductor: weak coupling, in which correlation effects are treated as a perturbation on an underlying metallic (although renormalized) Fermi liquid state, and strong coupling, in which the magnetism is associated with well defined localized spins, and stripes are viewed as a form of micro-phase separation. We present quantitative indicators that the latter view better accounts for the observed stripe phenomena in the cuprates.

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“…Perhaps the first evidence of such correlations was the measurement of inelastic magnetic scattering peaked at incommensurate wave vectors in La 2−x Sr x CuO 4 with x ≈ 0.15 [3][4][5]. Study of the charge modulation has become possible with the discovery that, for x ∼ 1 8 , stripes can be pinned by the structural modulation induced by partial substitution of the smaller ion Nd 3+ for La 3+ [6,7].…”

Section: Introductionmentioning

confidence: 99%

Charge segregation and antiferromagnetism in high-Tc superconductors

Tranquada¹,

Ichikawa²,

Kakurai³

et al. 1999

Journal of Physics and Chemistry of Solids

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Local antiferromagnetism coexists with superconductivity in the cuprates. Charge segregation provides a way to reconcile these properties. Direct evidence for modulated spin and charge densities has been found in neutron and X-ray scattering studies of Nd-doped La 2−x Sr x CuO 4 . Here we discuss the nature of the modulation, and present some new results for a Zn-doped sample. Some of the open questions concerning the connections between segregation and superconductivity are described.

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Low-energy incommensurate spin excitations in superconductingLa1.85Sr0.15<

Cited by 155 publications

References 11 publications

Two-dimensional incommensurate and three-dimensional commensurate magnetic order and fluctuations in La2−xBaxCuO

Two-dimensional incommensurate and three-dimensional commensurate magnetic order and fluctuations in La2−xBaxCuO

How to detect fluctuating stripes in the high-temperature superconductors

Charge segregation and antiferromagnetism in high-Tc superconductors

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