Extremely Correlated Fermi-Liquid Description of Normal-State ARPES in Cuprates

Gweon, G.-H.; Shastry, B. Sriram; Gu, Genda

doi:10.1103/physrevlett.107.056404

Cited by 35 publications

(92 citation statements)

References 23 publications

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“…Regarding ARPES lineshapes, we also emphasize that the recent successful comparison 6,7 between the ECFL and the experimental ARPES lineshapes in the optimally doped and overdoped cuprates along the nodal direction can just as well be interpreted as the similar success of the DMFT interpretation of these lineshapes. The adjustment of the momentum dependence of the caparison factor for different systems in Refs.…”

Section: Conclusion and Prospectsmentioning

confidence: 54%

Extremely correlated Fermi liquid theory meets dynamical mean-field theory: Analytical insights into the doping-driven Mott transition

et al. 2013

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We consider a doped Mott insulator in the large dimensionality limit within both the recently developed Extremely Correlated Fermi Liquid (ECFL) theory and the Dynamical Mean-Field Theory (DMFT). We show that the general structure of the ECFL sheds light on the rich frequencydependence of the DMFT self-energy. Using the leading Fermi-liquid form of the two key auxiliary functions introduced in the ECFL theory, we obtain an analytical ansatz which provides a good quantitative description of the DMFT self-energy down to hole doping level δ 0.2. In particular, the deviation from Fermi-liquid behavior and the corresponding particle-hole asymmetry developing at a low energy scale are well reproduced by this ansatz. The DMFT being exact at large dimensionality, our study also provides a benchmark of the ECFL in this limit. We find that the main features of the self-energy and spectral line-shape are well reproduced by the ECFL calculations in the O(λ 2 ) 'minimal scheme', for not too low doping level δ 0.3. The DMFT calculations reported here are performed using a state-of-the-art numerical renormalization-group impurity solver, which yields accurate results down to an unprecedentedly small doping level δ 0.001.

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Section: Conclusion and Prospectsmentioning

confidence: 54%

Extremely correlated Fermi liquid theory meets dynamical mean-field theory: Analytical insights into the doping-driven Mott transition

et al. 2013

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“…1(a)]. This is a common procedure [25] and an example of a raw background spectrum can be found in the supplemental information of Ref. [19].…”

Section: Resultsmentioning

confidence: 99%

Nodal Landau Fermi-liquid quasiparticles in overdoped La1.77Sr0.23CuO4

Fatuzzo

Sassa²,

Må̊nsson³

et al. 2014

Phys. Rev. B

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Nodal angle-resolved photoemission spectra taken on overdoped La 1.77 Sr 0.23 CuO 4 are presented and analyzed. It is proven that the low-energy excitations are true Landau Fermi-liquid quasiparticles. We show that momentum and energy distribution curves can be analyzed self-consistently without quantitative knowledge of the bare band dispersion. Finally, by imposing Kramers-Kronig consistency on the self-energy , insight into the quasiparticle residue is gained. We conclude by comparing our results to quasiparticle properties extracted from thermodynamic, magnetoresistance, and high-field quantum oscillation experiments on overdoped Tl 2 Ba 2 CuO 6+δ .

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“…Several recent applications of the ECFL theory, mentioned below, show promise in terms of reproducing the salient features of exact numerical solutions of strong coupling models, wherever available 5,6 . The theory has also had success in reconciling extensive data on angle resolved photo emission (ARPES) line shapes 7 , including subtle features such as the low energy kinks, and has made testable predictions on the asymmetry of line shapes 8 .…”

Section: Introductionmentioning

confidence: 99%

Low-energy physics of thet−Jmodel ind=∞using extremely correlated Fermi liquid theory: Cutoff second-order equations

Shastry

Perepelitsky

2016

Phys. Rev. B

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We present the results for the low energy properties of the infinite dimensional t-J model with J = 0, using O(λ 2 ) equations of the extremely correlated Fermi liquid formalism. The parameter λ ∈ [0, 1] is analogous to the inverse spin parameter 1/(2S) in quantum magnets. The present analytical scheme allows us to approach the physically most interesting regime near the Mott insulating state n < ∼ 1. It overcomes the limitation to low densities n < ∼ .7 of earlier calculations, by employing a variant of the skeleton graph expansion, and a high frequency cutoff that is essential for maintaining the known high-T entropy. The resulting quasiparticle weight Z, the low ω, T self energy and the resistivity are reported. These are quite close at all densities to the exact numerical results of the U = ∞ Hubbard model, obtained using the dynamical mean field theory. The present calculation offers the advantage of generalizing to finite T rather easily, and allows the visualization of the loss of coherence of Fermi liquid quasiparticles by raising T . The present scheme is generalizable to finite dimensions and a non vanishing J.

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Extremely Correlated Fermi-Liquid Description of Normal-State ARPES in Cuprates

Cited by 35 publications

References 23 publications

Extremely correlated Fermi liquid theory meets dynamical mean-field theory: Analytical insights into the doping-driven Mott transition

Extremely correlated Fermi liquid theory meets dynamical mean-field theory: Analytical insights into the doping-driven Mott transition

Nodal Landau Fermi-liquid quasiparticles in overdoped La1.77Sr0.23CuO4

Low-energy physics of thet−Jmodel ind=∞using extremely correlated Fermi liquid theory: Cutoff second-order equations

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