Néel transition and sublattice magnetization of pure and doped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml

Keimer, B.; Aharony, Amnon; Auerbach, Assa; Birgeneau, R. J.; Cassanho, A.; Endoh, Y.; Erwin, R. W.; Kastner, M. A.; Shirane, G.

doi:10.1103/physrevb.45.7430

Cited by 175 publications

(137 citation statements)

References 30 publications

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“…This behaviour can be ascribed to a 'thermal response', that is, it is compatible with the shift towards lower energies of the CTP on heating 27,30,31 as seen in Fig. 1.…”

Section: Resultssupporting

confidence: 51%

“…The excess oxygen content dB5 Â 10 À 3 is estimated from the measured Néel temperature of 229 K (ref. 27). Ds 1 (o, t) is obtained from DR(o, t)/R(o) with a novel data analysis methodology based on the Kramers-Kronig (KK) relations.…”

Section: Resultsmentioning

confidence: 99%

“…The HHH represents a standard approach for underdoped cuprates where the insulating state arises from the strong repulsion between the electrons. By taking into account both onsite Coulomb repulsion U and an effective electron-boson interaction 30 , the HHH can reproduce the equilibrium optical properties of cuprates both undoped and with tiny doping 13 and rationalizes the presence of tail states responsible for the broad below-gap absorption 13,27,33 . We argue that these tail states are responsible for the non-adiabatic contribution for sub-gap pumping and for the linearity of the optical response as a function of pump fluence (see Methods).…”

Section: Discussionmentioning

confidence: 99%

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Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system

et al. 2014

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The non-equilibrium approach to correlated electron systems is often based on the paradigm that different degrees of freedom interact on different timescales. In this context, photo-excitation is treated as an impulsive injection of electronic energy that is transferred to other degrees of freedom only at later times. Here, by studying the ultrafast dynamics of quasi-particles in an archetypal strongly correlated charge-transfer insulator (La 2 CuO 4 þ d ), we show that the interaction between electrons and bosons manifests itself directly in the photo-excitation processes of a correlated material. With the aid of a general theoretical framework (Hubbard-Holstein Hamiltonian), we reveal that sub-gap excitation pilots the formation of itinerant quasi-particles, which are suddenly dressed by an ultrafast reaction of the bosonic field.

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“…This behaviour can be ascribed to a 'thermal response', that is, it is compatible with the shift towards lower energies of the CTP on heating 27,30,31 as seen in Fig. 1.…”

Section: Resultssupporting

confidence: 51%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system

et al. 2014

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“…The crystals were all grown in the same excess oxygen atomosphere resulting in a small oxygen off-stoichiometry. This oxygen off-stoichiometry could be estimated by measuring the 3D C AF phase transition in undoped La 2 CuO 4+δ , as T N is known to be sensitive to the precise value of δ 39 . From a determination that T N ∼ 250 K for our La 2 CuO 4+δ single crystal, we estimate that δ ≈ 0.004.…”

Section: Methodsmentioning

confidence: 99%

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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“…via Zn substitution for Cu in the same materials. [3][4][5] This competition of AF and chemical doping is a central feature of many other strongly correlated systems, including Li doping in nickel oxides, 6,7 spin chains, 8 and ladders, 9 and has been explored by QMC approaches in single band fermion models 10 and their strong coupling spin limits. 11 Materials with multiple fermionic bands or localized spins in multi-chain or multi-layer geometries offer an additional richness to the effect of impurities on AF, since even in the clean limit they can exhibit a quantum critical point (QCP) separating AF and singlet phases.…”

Section: Introductionmentioning

confidence: 99%

Impurities near an antiferromagnetic-singlet quantum critical point

et al. 2017

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Heavy fermion systems, and other strongly correlated electron materials, often exhibit a competition between antiferromagnetic (AF) and singlet ground states. Using exact Quantum Monte Carlo (QMC) simulations, we examine the effect of impurities in the vicinity of such AFsinglet quantum critical point (QCP), through an appropriately defined "impurity susceptibility," χimp. Our key finding is a connection, within a single calculational framework, between AF domains induced on the singlet side of the transition, and the behavior of the nuclear magnetic resonance (NMR) relaxation rate 1/T1. We show that local NMR measurements provide a diagnostic for the location of the QCP which agrees remarkably well with the vanishing of the AF order parameter and large values of χimp.

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Néel transition and sublattice magnetization of pure and dopedLa2CuO4

Cited by 175 publications

References 30 publications

Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system

Witnessing the formation and relaxation of dressed quasi-particles in a strongly correlated electron system

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

Impurities near an antiferromagnetic-singlet quantum critical point

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