Reconstructed Fermi Surface of Underdoped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CaCu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>8</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math>Cuprate Superconductors

Yang, H. B.; Rameau, J. D.; Pan, Zhixing K.; Gu, Genda; Johnson, P. D.; Claus, H.; Hinks, D. G.; Kidd, Tim

doi:10.1103/physrevlett.107.047003

Cited by 132 publications

(153 citation statements)

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“…13 The same ansatz is consistent with the crossover from arcs to full Fermi surface observed in the SISTM studies and has also recently been shown to be consistent with the doping dependence observed for the carrier density in quantum oscillation studies. 37 Embedded within the YRZ phenomenology is a self-energy term associated with the doping dependent pseudogap,…”

Section: Introductionsupporting

confidence: 74%

“…Several studies have been interpreted as indicating a temperature dependent arc length, 10 others a doping dependent length. 11,12 More detailed studies have suggested that the arcs do, in fact, represent one side of an asymmetric hole-pocket 13 consistent with several models of the doped Mott insulator at low doping. 14,15,16 As a function of increased doping, the hole pockets grow with an area proportional to x, the doping level, until, at some critical doping level, the pockets switch to the full Fermi surface, associated with a more metallic state, as the pseudogap disappears.…”

Section: Introductionmentioning

confidence: 84%

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Cuprate phase diagram and the influence of nanoscale inhomogeneities

et al. 2017

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Abstract:The phase diagram associated with the high Tc superconductors is complicated by an array of different ground states. The parent material represents an antiferromagnetic insulator but with doping superconductivity becomes possible with transition temperatures previously thought unattainable. The underdoped region of the phase diagram is dominated by the so-called pseudogap phenomena whereby in the normal state the system mimics superconductivity in its spectra response but does not show the complete loss of resistivity associated the superconducting state. An understanding of this regime presents one of the great challenges for the field. In the present study we revisit the structure of the phase diagram as determined in photoemission studies. By careful analysis of the role of nanoscale inhomogenities in the overdoped region we are able to more carefully separate out the gaps due to the psudogap phenomena from the gaps due to the superconducting transition. Within a mean field description we are thus able to link the magnitude of the gap directly to the Heisenberg exchange interaction term, ∑ . , contained in the model. This approach provides a clear indication that the pseudogap is that associated with spin singlet formation.Introduction:

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Section: Introductionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 84%

Cuprate phase diagram and the influence of nanoscale inhomogeneities

et al. 2017

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“…3(g), near the tip of the Fermi arc the band dispersion is not particle-hole symmetric but simply turns around and loses spectral weight. This feature has been emphasized by Yang et al [36] in their data, which they interpreted using a phenomenological model by Yang et al [37]. A second unusual feature of the data of Ref.…”

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confidence: 75%

“…In particular, the CDW model predicts a large gap below the Fermi level at the end of the Fermi arc, which has never been seen experimentally. In fact, it has been emphasized that a gap exists above the Fermi level near the end of the Fermi arc [36]. We note that Ref.…”

Section: Appendix A: Incompatibility Of the Cdw Model With The Arpes mentioning

confidence: 99%

Amperean Pairing and the Pseudogap Phase of Cuprate Superconductors

2014

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The enigmatic pseudogap phase in underdoped cuprate high-T c superconductors has long been recognized as a central puzzle of the T c problem. Recent data show that the pseudogap is likely a distinct phase, characterized by a medium range and quasistatic charge ordering. However, the origin of the ordering wave vector and the mechanism of the charge order is unknown. At the same time, earlier data show that precursive superconducting fluctuations are also associated with this phase. We propose that the pseudogap phase is a novel pairing state where electrons on the same side of the Fermi surface are paired, in strong contrast with conventional Bardeen-Cooper-Schrieffer theory which pairs electrons on opposite sides of the Fermi surface. In this state the Cooper pair carries a net momentum and belongs to a general class called pair density wave. The microscopic pairing mechanism comes from a gauge theory formulation of the resonating valence bond (RVB) picture, where spinons traveling in the same direction feel an attractive force in analogy with Ampere's effects in electromagnetism. We call this Amperean pairing.Charge order automatically appears as a subsidiary order parameter even when long-range pair order is destroyed by phase fluctuations. Our theory gives a prediction of the ordering wave vector which is in good agreement with experiment. Furthermore, the quasiparticle spectrum from our model explains many of the unusual features reported in photoemission experiments. The Fermi arc, the unusual way the tip of the arc terminates, and the relation of the spanning vector of the arc tips to the charge ordering wave vector also come out naturally. Finally, we propose an experiment that can directly test the notion of Amperean pairing. DOI: 10.1103/PhysRevX.4.031017 Subject Areas: Condensed Matter Physics, SuperconductivitySince the early days of cuprate superconductivity research, the pseudogap phase has been identified as a central piece of the high-T c puzzle [1]. The pseudogap opens below a temperature T Ã much above T c in underdoped cuprates, and it is visible in the spin susceptibility as detected by the Knight shift, in tunneling spectroscopy and in c-axis conductivity. Angle-resolved photoemission (ARPES) shows that the pseudogap opens in the antinodal region near ð0; πÞ (we set the lattice constant a to unity), leaving behind ungapped "Fermi arcs" centered around the nodes. Recent x-ray scattering data [2][3][4][5] reveal that the pseudogap is likely to be a distinct phase, characterized by the onset of a charge density wave (CDW) with wave vectors at ð0; AEδÞ and ðAEδ; 0Þ, where δ decreases with increasing doping, thus confirming evidence for charge order found earlier by scanning tunneling microscope (STM) [6][7][8][9] and nuclear magnetic resonance (NMR) experiments [10]. Recent advances include STM and x-ray studies on the same Bi 2 Sr 2 CaCu 2 O 8þx (Bi-2212) samples [11]. Other signatures include Kerr rotation [12], the emergence of anisotropy in the Nernst effect, etc. [13]. (Another set of exp...

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“…This was motivated by the need to reconcile transport experiments [13][14][15][16] and photoemission data [17][18][19] in the underdoped region of cuprate superconductors: while photoemission data show Fermi arcs enclosing an area 1 + p (with p being the doping), transport measurements indicate plain Fermi-liquid properties consistent with an area p. In order to resolve this issue and produce a Fermi liquid which encloses an area p, the authors of Refs. [10][11][12] introduced a model for the pseudogap region of the cuprate superconductors which consists of two types of dimers: one spinless bosonic dimer -representing a valence bond between two neighboring spins -and one spin 1/2 fermionic dimer representing a hole delocalized between two sites.…”

Section: Introductionmentioning

confidence: 99%

d-wave superconductivity in boson+fermion dimer models

2017

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We present a slave-particle mean-field study of the mixed boson+fermion quantum dimer model introduced by Punk, Allais, and Sachdev [PNAS 112, 9552 (2015)] to describe the physics of the pseudogap phase in cuprate superconductors. Our analysis naturally leads to four charge e fermion pockets whose total area is equal to the hole doping p, for a range of parameters consistent with the t − J model for high temperature superconductivity. Here we find that the dimers are unstable to d-wave superconductivity at low temperatures. The region of the phase diagram with d-wave rather than s-wave superconductivity matches well with the appearance of the four fermion pockets. In the superconducting regime, the dispersion contains eight Dirac cones along the diagonals of the Brillouin zone.

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Reconstructed Fermi Surface of UnderdopedBi2Sr2CaCu2O8+δCuprate Superconductors

Cited by 132 publications

References 25 publications

Cuprate phase diagram and the influence of nanoscale inhomogeneities

Cuprate phase diagram and the influence of nanoscale inhomogeneities

Amperean Pairing and the Pseudogap Phase of Cuprate Superconductors

d-wave superconductivity in boson+fermion dimer models

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