Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

Buzon, Guillermo; Foussats, A.; Bejas, Matías; Greco, A.

doi:10.1103/physrevb.89.024516

Cited by 2 publications

(2 citation statements)

References 99 publications

(162 reference statements)

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“…Quasiparticle-phonon interactions in dichalcogenides [32,33] and a Mott transition in organic superconductors [34] have also been proposed. For the cuprates, self-energy effects near the charge-density wave instability have been theorized [35]. Our present results show that the power-law self-energy inferred from ARPES experiments can produce the superconducting dome.…”

Section: Discussionsupporting

confidence: 56%

Scale invariance as the cause of the superconducting dome in the cuprates

et al. 2018

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Recent photoemission spectroscopy measurements (T. J. Reber et al., arXiv:1509.01611) of cuprate superconductors have inferred that the self-energy exhibits critical scaling over an extended doping regime, thereby calling into question the conventional wisdom that critical scaling exists only at isolated points. In particular, this new state of matter, dubbed a power-law liquid, has a selfenergy whose imaginary part scales as Σ ∼ (ω 2 + π 2 T 2 ) α , with α = 1 in the overdoped Fermi-liquid state and α ≤ 0.5 in the optimal to underdoped regime. Previously, we showed that this self-energy can arise from interactions between electrons and unparticles, a scale-invariant sector that naturally emerges from strong correlations. Here, taking the self-energy as a given, we first reconstruct the real part of the self-energy. We find that the resultant quasiparticle weight vanishes for any doping level less than optimal, implying an absence of particle-like excitations in the underdoped regime. Consequently, the Fermi velocity vanishes and the effective mass diverges for α ≤ 1 2 , in agreement with earlier experimental observations. We then use the self-energy to reconstruct the spectral function and compute the superconducting Tc within the BCS formalism. We find that the Tc has a dome-like structure, implying that broad scale invariance manifested in the form of a power-law liquid is the likely cause of the superconducting dome in the cuprates.

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Section: Discussionsupporting

confidence: 56%

Scale invariance as the cause of the superconducting dome in the cuprates

et al. 2018

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“…doping in the QCP had been debated-upon both in over-doped and underdoped regions of the cuprates. Recently the universal dome-shaped behavior [21] was introduced to separate the over-doped and under-doped regions. Another popular concept of the critical temperature (Tc) of the cuprates superconductor is the layering of unit cells.…”

Section: Introductionmentioning

confidence: 99%

How Reliable is the Cuprates System to Recent Technology?

Emetere¹,

Awojoyogbe²,

U.E.³

et al. 2016

IJECE

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The emergence of cuprates as a high Tc superconductor gave high hopes in the discovery of a room temperature superconductor. It is almost three decades and the highest critical temperature attained on the cuprates is about 135K. A brief overview was conducted on the progress made so far on the cuprates. A mathematical approach was used to design a formula which could determine the experimental results of critical temperature of versed cuprates superconductors. The result of our findings shows that the possibility of attaining the experimental room temperature cuprates superconductor seems very narrow. The study recommended an elaborate approach on the hybridization of cuprates for future research. Hence, there is possibility of having cuprates with wide engineering application.

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Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

Cited by 2 publications

References 99 publications

Scale invariance as the cause of the superconducting dome in the cuprates

Scale invariance as the cause of the superconducting dome in the cuprates

How Reliable is the Cuprates System to Recent Technology?

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