Evidence for Pairing above the Transition Temperature of Cuprate Superconductors from the Electronic Dispersion in the Pseudogap Phase

Kanigel, Amit; Chatterjee, U. K.; Randeria, Mohit; Norman, M. R.; Koren, G.; Kadowaki, Kazunori; Campuzano, J. C.

doi:10.1103/physrevlett.101.137002

Cited by 136 publications

(142 citation statements)

References 28 publications

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“…A particularly interesting case is the cuprate high-temperature superconductors, where the parent and SC phases do not appear to coexist but the phase competition is actually intensified by the emerging of a "strange metal" normal state with pseudogap opening at a temperature T * well above T c in the underdoped regime [5]. The origin of the pseudogap has been controversial, being attributed to preformation of Cooper pairs [16][17][18][19][20][21] or a hidden CO such as d-density wave (DDW) [22][23][24][25][26][27], spin-density wave (SDW) [28][29][30][31], loop-current [32], nematic or stripe order [33][34][35][36][37][38], and pair density wave [39,40], etc. It has been observed that upon doping, T * decreases gradually in the normal state above the T c dome, and enters into the SC dome near the optimal doping level at x OP .…”

Section: Introductionmentioning

confidence: 99%

Phase competition and anomalous thermal evolution in high-temperature superconductors

Zhou

Yin

et al. 2017

Phys. Rev. B

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The interplay of competing orders is relevant to high-temperature superconductivity known to emerge upon suppression of a parent antiferromagnetic order typically via charge doping. How such interplay evolves at low temperature-in particular at what doping level the zero-temperature quantum critical point (QCP) is located-is still elusive because it is masked by the superconducting state. The QCP had long been believed to follow a smooth extrapolation of the characteristic temperature T * for the strange normal state well above the superconducting transition temperature. However, recently the T * within the superconducting dome was reported to unexpectedly exhibit back-bending likely in the cuprate Bi2Sr2CaCu2O 8+δ . Here we show that the original and revised phase diagrams can be understood in terms of weak and moderate competitions, respectively, between superconductivity and a pseudogap state such as d-density-wave or spin-density-wave, based on both Ginzburg-Landau theory and the realistic t-t ′ -t ′′ -J-V model for the cuprates. We further found that the calculated temperature and doping-level dependence of the quasiparticle spectral gap and Raman response qualitatively agrees with the experiments. In particular, the T * back-bending can provide a simple explanation of the observed anomalous two-step thermal evolution dominated by the superconducting gap and the pseudogap, respectively. Our results imply that the revised phase diagram is likely to take place in high-temperature superconductors.

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Section: Introductionmentioning

confidence: 99%

Phase competition and anomalous thermal evolution in high-temperature superconductors

Zhou

Yin

et al. 2017

Phys. Rev. B

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“…Numerous experimental data [10,[27][28][29][30][31][32][33][34][35] provided a rather clear evidence that the critical temperature T c in the underdoped cuprate superconductors (and similarly in the ultracold fermion gasses near the unitary limit [38]) is not related to appearance of the fermion pairs but corresponds to the onset of their phase coherence. Upon approaching T c from above the short-range superconducting correlations gradually emerge.…”

Section: Superconducting Fluctuationsmentioning

confidence: 99%

“…They are mutually coupled through the charge exchange (Andreev-type) scattering. Such scenario (31) has been considered by various authors in the context of high T c superconductivity [14][15][16][17][18][19][20][21] and for description of the resonant Feshbach interaction in the ultracold fermion atom gasses [36][37][38].…”

Section: Superconducting Fluctuationsmentioning

confidence: 99%

Flow equation approach to the linear response theory of superconductors

Zapalska

Domański

2011

Phys. Rev. B

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We apply the flow equation method for studying the current-current response function of electron systems with the pairing instability. To illustrate the specific scheme in which the flow equation procedure determines the two-particle Green's functions we reproduce the standard response kernel of the BCS superconductor. We next generalize this non-perturbative treatment considering the pairing field fluctuations. Our study indicates that the residual diamagnetic behavior detected above the transition temperature in the cuprate superconductors can originate from the noncondensed preformed pairs.

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“…Above T c , the pseudogap is gradually filling up and remains essentially constant, with a tendency to increase at higher temperature before vanishing at a crossover temperature known as T * . Also some ARPES measuremets seem to provide an evidence for the direct relation between the pseudogap and pairing [25]. In the underdoped compounds, instead of a complete Fermi surface above T c , only disconnected Fermi arcs appear, separated by regions which still exhibit an energy gap.…”

Section: Introductionmentioning

confidence: 99%

“…The term pseudogap has been coined to describe this kind of physics. The presence of pseudogap has been established through the measurements of the nuclear magnetic resonance (NMR) [5], the scanning tunneling spectroscopy [6][7][8][9], the analysis of the electronic Raman scattering [10][11][12], through time-resolved optical spectroscopy [13][14][15][16][17][18], and through the ARPES [19][20][21][22][23][24][25]. The observed strong Nernst effect in cuprates has been also attributed to it [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Spin Polaron-Bipolaron Scenario of Three Gap-Like Energy Scales in Superconducting Cuprates

et al. 2010

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We argue that three gaps observed in underdoped cuprates can be attributed to the formation of antiferromagnetic spin polarons and bipolarons. Within the spin polaron scenario the antinodal pseudogap at he high energy scale originates from the change of the Fermi surface topology, induced by antiferromagnetic correlations. That change gives rise to the diminishing of the spectral weight at the antinodal region near the Brillouin zone boundary. We demonstrate that effect by analyzing effective models of doped antiferromagnets. The second type of pseudogap appearing at the intermediate energy scale originates from the phenomena which are precursory to superconductivity and predominantly concern the portion of the Fermi surface near the nodal region. In order to analyze the latter phenomenon we use the negative U Hubbard model, in which many details typical to spin polaron physics are neglected, but which contains the essential ingredient of it, that is the strong short range attraction. The lowest energy scale is related to the true superconducting gap which develops with doping, although both types of pseudogap diminish with doping. This behavior can be explained by the fact that the spin polaron band is empty in the undoped system and therefore the formation of the superconducting state in the system is forbidden. Due to a pedagogical character of this report, we present in the introduction a short overview of mostly recent experimental results which are related to the gap-pseudogap physics.

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Evidence for Pairing above the Transition Temperature of Cuprate Superconductors from the Electronic Dispersion in the Pseudogap Phase

Cited by 136 publications

References 28 publications

Phase competition and anomalous thermal evolution in high-temperature superconductors

Phase competition and anomalous thermal evolution in high-temperature superconductors

Flow equation approach to the linear response theory of superconductors

Spin Polaron-Bipolaron Scenario of Three Gap-Like Energy Scales in Superconducting Cuprates

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