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Maki, Makoto; Nishizaki, Terukazu; Shibata, Kenji; Kobayashi, Norio

doi:10.1103/physrevb.72.024536

Cited by 19 publications

(10 citation statements)

References 32 publications

(31 reference statements)

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“…X-ray diffraction experiments on optimally-doped YBa 2 Cu 3 Cu 6+x containing ortho-IV domains of nominal composition p ≈ 14 % (i.e. x ≈ 0.75) indicate signatures of a Q y superstructure with λ b ≈ 4.7 [87] − potentially supported by STM [89,90], NMR [91,92] and neutron scattering measurements of phonon softening [93,94] which persist deep into the underdoped regime [95].…”

Section: Small Q Ordermentioning

confidence: 91%

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Towards resolution of the Fermi surface in underdoped high-T_csuperconductors

2012

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We survey recent experimental results including quantum oscillations and complementary measurements probing the electronic structure of underdoped cuprates, and theoretical proposals to explain them. We discuss quantum oscillations measured at high magnetic fields in the underdoped cuprates that reveal a small Fermi surface section, comprising quasiparticles that obey Fermi-Dirac statistics, unaccompanied by other states of comparable thermodynamic mass at the Fermi level. The location of the observed Fermi surface section at the nodes is indicated by a body of evidence including the collapse in Fermi velocity measured by quantum oscillations, which is found to be associated with the nodal density of states observed in angular resolved photoemission, the persistence of quantum oscillations down to low fields in the vortex state, the small value of density of states from heat capacity and the multiple frequency quantum oscillation pattern consistent with nodal magnetic breakdown of bilayer-split pockets. A nodal Fermi surface pocket is further consistent with the observation of a density of states at the Fermi level concentrated at the nodes in photoemission experiments, and the antinodal pseudogap observed by photoemission, optical conductivity, nuclear magnetic resonance (NMR) Knight shift, as well as other complementary diffraction, transport and thermodynamic measurements. One of the possibilities considered is that the small Fermi surface pockets observed at high magnetic fields can be understood in terms of Fermi surface reconstruction by a form of small wavevector charge order, observed over long lengthscales in experiments such as NMR and x-ray scattering, potentially accompanied by an additional mechanism to gap the antinodal density of states.

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Section: Small Q Ordermentioning

confidence: 91%

“…15b), suggesting the possibility of a secondary charge modulation. Different wavevectors for the bonding and antibonding bands could potentially explain the range of λ values seen in YBa 2 Cu 3 O 6+x using different experiments [87,88,57,89,90,93,94,95]. ] are shown for the antibonding (AB) and bonding (B) bands respectively.…”

Section: Small Q Ordermentioning

confidence: 99%

Towards resolution of the Fermi surface in underdoped high-T_csuperconductors

2012

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“…Instead, at the node, we have a -density wave [137], a more-or-less ordinary AF spin order [75][76][77][78][138][139][140][141][142], and a nodal pocket from bilayer low-charge order, slowly fluctuacting [135,[143][144][145]. This latter proposal, which is among the newest on the table, relies on many experimental measurements: STM [146][147][148][149][150], neutron scattering [122], X-ray diffraction [151], NMR [152], RXS [153], and phonon softening [154][155][156]. A proposal regarding the emergence of a hidden Fermi liquid [157] is also worth mentioning.…”

Section: Introductionmentioning

confidence: 99%

Composite Operator Method Analysis of the Underdoped Cuprates Puzzle

Avella

2014

Advances in Condensed Matter Physics

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The microscopical analysis of the unconventional and puzzling physics of the underdoped cuprates, as carried out lately by means of the composite operator method (COM) applied to the 2D Hubbard model, is reviewed and systematized. The 2D Hubbard model has been adopted as it has been considered the minimal model capable of describing the most peculiar features of cuprates held responsible for their anomalous behavior. COM is designed to endorse, since its foundation, the systematic emergence in any SCS of new elementary excitations described by composite operators obeying noncanonical algebras. In this case (underdoped cuprates—2D Hubbard model), the residual interactions—beyond a 2-pole approximation—between the new elementary electronic excitations, dictated by the strong local Coulomb repulsion and well described by the two Hubbard composite operators, have been treated within the noncrossing approximation. Given this recipe and exploiting the few unknowns to enforce the Pauli principle content in the solution, it is possible to qualitatively describe some of the anomalous features of high-Tc cuprate superconductors such as large versus small Fermi surface dichotomy, Fermi surface deconstruction (appearance of Fermi arcs), nodal versus antinodal physics, pseudogap(s), and kinks in the electronic dispersion. The resulting scenario envisages a smooth crossover between an ordinary weakly interacting metal sustaining weak, short-range antiferromagnetic correlations in the overdoped regime to an unconventional poor metal characterized by very strong, long-but-finite-range antiferromagnetic correlations leading to momentum-selective non-Fermi liquid features as well as to the opening of a pseudogap and to the striking differences between the nodal and the antinodal dynamics in the underdoped regime.

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“…First, the observation of CO domain embedded in the SC phase can be rationalized as follows: The periodicity of the CO is known to depend directly on the oxygen content (i.e., hole concentration 2,34 ). This suggests that the samples exhibit local fluctuations of the hole concentration 30 in analogy to dopant fluctuations in semiconductors 35 .…”

Section: Discussionmentioning

confidence: 99%

Atomically-resolved interlayer charge ordering and its interplay with superconductivity in YBa2Cu3O6.81

et al. 2021

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High-temperature superconductive (SC) cuprates exhibit not only a SC phase, but also competing orders, suppressing superconductivity. Charge order (CO) has been recognized as an important competing order, but its microscopic spatial interplay with SC phase as well as the interlayer coupling in CO and SC phases remain elusive, despite being essential for understanding the physical mechanisms of competing orders and hence superconductivity. Here we report the achievement of direct real-space imaging with atomic-scale resolution of cryogenically cleaved YBa2Cu3O6.81 using cross-sectional scanning tunneling microscopy/spectroscopy. CO nanodomains are found embedded in the SC phase with a proximity-like boundary region characterized by mutual suppression of CO and superconductivity. Furthermore, SC coherence as well as CO occur on both CuO chain and plane layers, revealing carrier transport and density of states mixing between layers. The CO antiphase correlation along the c direction suggests a dominance of Coulomb repulsion over Josephson tunneling between adjacent layers.

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Layered charge-density waves with nanoscale coherence inYBa2Cu3O7−δ

Cited by 19 publications

References 32 publications

Towards resolution of the Fermi surface in underdoped high-T_csuperconductors

Towards resolution of the Fermi surface in underdoped high-T_csuperconductors

Composite Operator Method Analysis of the Underdoped Cuprates Puzzle

Atomically-resolved interlayer charge ordering and its interplay with superconductivity in YBa2Cu3O6.81

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Layered charge-density waves with nanoscale coherence inYBa2Cu3O7−δ

Cited by 19 publications

References 32 publications

Towards resolution of the Fermi surface in underdoped high-Tcsuperconductors

Towards resolution of the Fermi surface in underdoped high-Tcsuperconductors

Composite Operator Method Analysis of the Underdoped Cuprates Puzzle

Atomically-resolved interlayer charge ordering and its interplay with superconductivity in YBa2Cu3O6.81

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Product

Resources

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Towards resolution of the Fermi surface in underdoped high-T_csuperconductors

Towards resolution of the Fermi surface in underdoped high-T_csuperconductors