Anomalous Momentum Dependence of the Superconducting Coherence Peak and Its Relation to the Pseudogap of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>La</mml:mi><mml:mn>1.85</mml:mn></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mn>0.15</mml:mn></mml:msub><mml:msub><mml:mi>CuO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>

Terashima, Kazuhiko; Matsui, H.; Sato, Takafumi; Takahashi, Takashi; Kofu, Maiko; Hirota, K.

doi:10.1103/physrevlett.99.017003

Cited by 94 publications

(89 citation statements)

References 33 publications

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“…The most important feature is that the measured gap exhibits clear enhancement as temperature increases above T d (under the T c dome), especially for slight underdoping. Therefore, we find a special temperature region in the intermediate doping region where the measured gap shows anomalous temperature dependence, in good agreement with ARPES measurements on various families of cuprates [47][48][49][50]. The present explanation also differs from the previous illustrations that attribute the anomalous temperature dependence of the measured antinodal gap to either the Fermi function [69] or the weakened SC gap [70].…”

Section: A the Quasiparticle Spectral Functionssupporting

confidence: 87%

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: A the Quasiparticle Spectral Functionssupporting

confidence: 87%

Phase competition and anomalous thermal evolution in high-temperature superconductors

Zhou

Yin

et al. 2017

Phys. Rev. B

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“…2(a)]. However, most of the ARPES reports show disconnected arcs 13,[49][50][51][52][53][54][55][56][57][58][59][60][61] and to a lesser extent show pockets, [62][63][64][65][66][67] without full agreement on shape and localization of the pockets inside the Brillouin zone. Since experiments do not show clearly any turn at the end of the arc, the existence of a pocket and the breaking of translational symmetry is doubtful.…”

Section: Pseudogap Self-energy Effects: Comparison With Arpes Anmentioning

confidence: 99%

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

et al. 2014

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Hole doped cuprates show a superconducting critical temperature Tc which follows an universal dome-shaped behavior as function of doping. It is believed that the origin of superconductivity in cuprates is entangled with the physics of the pseudogap phase. An open discussion is whether the source of superconductivity is the same that causes the pseudogap properties. The t-J model treated in large-N expansion shows d-wave superconductivity triggered by non-retarded interactions, and an instability of the paramagnetic state to a flux phase or d-wave charge density wave (d-CDW) state. In this paper we show that self-energy effects near d-CDW instability may lead to a dome-shaped behavior of Tc. In addition, it is also shown that these self-energy contributions may describe several properties observed in the pseudogap phase. In this picture, although fluctuations responsible for the pseudogap properties leads to a dome-shaped behavior, they are not involved in pairing which is mainly non-retarded.

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“…This is particularly significant because this bosonic shift may be connected to the softening of a particular phonon mode with a characteristic wavevector seen by INS in LaBi2201 [20]. Indeed, this shifting of the kink energy from the node to the AN has long been observed in the double layered bismuth cuprates [29][30] [31]. In Fig.…”

mentioning

confidence: 91%

Crossover region between nodal and antinodal states at the Fermi level of optimally doped and overdopedBi2Sr1.6Nd0.4
Garcia
¹
,
Graf
²
,
Hwang
³

et al. 2010
Phys. Rev. B
2
0
0
2
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We have studied Bi2Sr1.6Nd0.4CuO 6+δ using Angle Resolved Photoemission Spectroscopy in the optimal and overdoped regions of the phase diagram. We identify a narrow crossover region in the electronic structure between the nodal and antinodal regions associated with the deviation from a pure d-wave gap function, an abrupt increase of the quasiparticle lifetime, the formation of Fermi arcs above Tc, and a sudden shift of the bosonic mode energy from higher energy, ∼60meV, near the nodal direction, to lower energy, ∼20meV, near the antinodal direction. Our work underscores the importance of a unique crossover region in the momentum space near EF for the single layered cuprates, between the nodal and antinodal points, that is independent of the antiferromagnetic zone boundary.Understanding the near-E F electronic band structure is essential to making sense of the superconducting cuprate phase diagram. Increasingly, studies on these systems are suggesting that the Fermi surface (FS) may be better thought of as divided into regions along. For example, the partial gapping of the FS in the pseudogap (PG) phase results in the unusual formation of ungapped regions which appear as disconnected arcs or "Fermi Arcs" (FA [18]. STM work has suggested another potential crossover region on the Fermi surface associated with the antiferromagnetic zone boundary, characterized by the disappearance of the coherent quasiparticle (QP) peak [19]. Also, bosonic modes which introduce "kinks" in the near-E F band structure may define a key region of the FS. Recent work finds a shift in the kink energy towards low binding energy correlated with the softening of the Cu-O bond stretching (BS) phonon at a critical FS nesting wavevector [20]. Finally, recent quantum oscillation data [21][22] have suggested that the FS is indeed separated into hole and electron pockets providing another crossover region for the low energy QP. Although controversial, evidence for an hole pocket on the FS has been recently provided by photoemission experiments [23]. Thus, it is increasingly important that we continue to explore • ±1• away from the nodal point. (c) Leading edge gap data for both SC and PG phases. Here the violet region is shifted to include the expected FA scaling for T=40K (indicated by the brown line).

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Anomalous Momentum Dependence of the Superconducting Coherence Peak and Its Relation to the Pseudogap ofLa1.85Sr0.15CuO4

Cited by 94 publications

References 33 publications

Phase competition and anomalous thermal evolution in high-temperature superconductors

Phase competition and anomalous thermal evolution in high-temperature superconductors

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

Crossover region between nodal and antinodal states at the Fermi level of optimally doped and overdopedBi2Sr1.6Nd0.4
Garcia
¹
,
Graf
²
,
Hwang
³

et al. 2010
Phys. Rev. B
2
0
0
2
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Anomalous Momentum Dependence of the Superconducting Coherence Peak and Its Relation to the Pseudogap ofLa1.85Sr0.15CuO4

Cited by 94 publications

References 33 publications

Phase competition and anomalous thermal evolution in high-temperature superconductors

Phase competition and anomalous thermal evolution in high-temperature superconductors

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

Crossover region between nodal and antinodal states at the Fermi level of optimally doped and overdopedBi2Sr1.6Nd0.4Garcia1, Graf2, Hwang3 et al. 2010Phys. Rev. B2002View full textAdd to dashboardCite

Contact Info

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Crossover region between nodal and antinodal states at the Fermi level of optimally doped and overdopedBi2Sr1.6Nd0.4
Garcia
¹
,
Graf
²
,
Hwang
³

et al. 2010
Phys. Rev. B
2
0
0
2
View full text Add to dashboard Cite