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Khasanov, R.; Kondo, Takeshi; Bendele, M.; Hamaya, Yoichiro; Kaminski, Adam; Ray, S. J.; Takeuchi, Tsunehiro

doi:10.1103/physrevb.82.020511

Cited by 11 publications

(18 citation statements)

References 34 publications

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“…This observation has been supported directly by ARPES studies 41,48) and by QPI studies, 56,57) and indirectly by analyses of gðr; EÞ by fitting to a multi-parameter model for k-space structure of a dSC energy gap. 68) The minima (maxima) of the Bogoliubov bands k B ðAEEÞ should occur at the k-space location of the Fermi surface of the non-superconducting state.…”

Section: Special Topicsmentioning

confidence: 70%

“…They are associated with a strong antinodal pseudogap in k-space, 9,10) they exhibit slow dynamics without recombination to form Cooper pairs, 38) their Raman characteristics appear distinct from expectations for a d-wave superconductor, 40) and they appear not to contribute to superfluid density, 41) As described in x4, x5, and especially x6, underdoped cuprates exhibit an octet of dispersive Bogoliubov QPI wavevectors q i ðEÞ, but only upon a limited and doping-dependent arc in k-space. Surrounding the pseudogap energy E $ Á 1 , these phenomena are replaced by a spectrum of states whose dispersion is extremely slow [ Fig.…”

Section: Broken Spatial Symmetries Of E á 1 Pseudogap Statesmentioning

confidence: 98%

“…Two energy scales Á 1 and Á 0 associated with two distinct types of electronic excited states [6][7][8][9][38][39][40][41] are observed in underdoped cuprates by multiple distinct spectroscopies, and Á 0 and Á 1 diverge from one another with diminishing p [ Fig. 1(b) reproduced from ref .…”

Section: Hole-doped Cupratesmentioning

confidence: 99%

“…40) The superfluid density measured using muon spin rotation evolves with holedensity in a manner inconsistent the whole Fermi surface being available for delocalized Cooper pairing. 41) Figure 1(c) shows a schematic depiction of the Fermi surface within the CuO 2 Brillouin zone, and distinguishes the ''nodal'' from ''antinodal'' regions of k-space. Momentum-resolved examination of cuprate electronic structure using angle resolved photoemission spectroscopy (ARPES) in the PG phase reveals that excitations with E $ ÀÁ 1 occur near the antinodal regions k ¼ $ ð=a 0 ; 0Þ; ð0; =a 0 Þ, and that Á 1 ðpÞ increases rapidly as p !…”

Section: Hole-doped Cupratesmentioning

confidence: 99%

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Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-T_cSuperconductors

et al. 2012

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One of the key motivations for the development of atomically resolved spectroscopic imaging scanning tunneling microscopy (SI-STM) has been to probe the electronic structure of cuprate high temperature superconductors. In both the d-wave superconducting (dSC) and the pseudogap (PG) phases of underdoped cuprates, two distinct classes of electronic states are observed using SI-STM. The first class consists of the dispersive Bogoliubov quasiparticles of a homogeneous d-wave superconductor. These are detected below a lower energy scale jEj ¼ Á 0 and only upon a momentum space (k-space) arc which terminates near the lines connecting k ¼ AEð=a 0 ; 0Þ to k ¼ AEð0; =a 0 Þ. Below optimal doping, this ''nodal'' arc shrinks continuously with decreasing hole density. In both the dSC and PG phases, the only broken symmetries detected in the jEj Á 0 states are those of a d-wave superconductor. The second class of states occurs at energies near the pseudogap energy scale jEj $ Á 1 which is associated conventionally with the ''antinodal'' states near k ¼ AEð=a 0 ; 0Þ and k ¼ AEð0; =a 0 Þ. We find that these states break the expected 90 -rotational (C 4 ) symmetry of electronic structure within CuO 2 unit cells, at least down to 180 -rotational (C 2 ) symmetry (nematic) but in a spatially disordered fashion. This intra-unit-cell C 4 symmetry breaking coexists at jEj $ Á 1 with incommensurate conductance modulations locally breaking both rotational and translational symmetries (smectic). The characteristic wavevector Q of the latter is determined, empirically, by the k-space points where Bogoliubov quasiparticle interference terminates, and therefore evolves continuously with doping. The properties of these two classes of jEj $ Á 1 states are indistinguishable in the dSC and PG phases. To explain this segregation of k-space into the two regimes distinguished by the symmetries of their electronic states and their energy scales jEj $ Á 1 and jEj Á 0 , and to understand how this impacts the electronic phase diagram and the mechanism of high-T c superconductivity, represents one of a key challenges for cuprate studies.

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Section: Special Topicsmentioning

confidence: 70%

Section: Broken Spatial Symmetries Of E á 1 Pseudogap Statesmentioning

confidence: 98%

Section: Hole-doped Cupratesmentioning

confidence: 99%

Section: Hole-doped Cupratesmentioning

confidence: 99%

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Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-T_cSuperconductors

et al. 2012

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“…In underdoped cuprates, a variety of different spectroscopies reveal the two energy scales Δ 1 and Δ 0 in association with two distinct types of electronic excited states [5][6][7][37][38][39][40]. The energies Δ 0 and Δ 1 diverge from one another with diminishing p as shown in Fig.…”

Section: Two Characteristic Types Of Electronic States In Underdoped mentioning

confidence: 93%

Electronic structure of the cuprate superconducting and pseudogap phases from spectroscopic imaging STM

et al. 2011

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Abstract. We survey the use of spectroscopic imaging scanning tunneling microscopy (SI-STM) to probe the electronic structure of underdoped cuprates. Two distinct classes of electronic states are observed in both the d-wave superconducting (dSC) and the pseudogap (PG) phases. The first class consists of the dispersive Bogoliubov quasiparticle excitations of a homogeneous d-wave superconductor, existing below a lower energy scale E = 0 . We find that the Bogoliubov quasiparticle interference (QPI) signatures of delocalized Cooper pairing are restricted to a k-space arc, which terminates near the lines connecting k = ±(π/a 0 , 0) to k = ±(0, π/a 0 ). This arc shrinks continuously with decreasing hole density such that Luttinger's theorem could be satisfied if it represents the front side of a hole-pocket that is bounded behind by the 8 Author to whom any correspondence should be addressed. New Journal of Physics 13 (2011) 0650141367-2630/11/065014+32$33.00 © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft 2 lines between k = ±(π/a 0 , 0) and k = ±(0, π/a 0 ). In both phases, the only broken symmetries detected for the |E| < 0 states are those of a d-wave superconductor. The second class of states occurs proximate to the PG energy scale E = 1 . Here the non-dispersive electronic structure breaks the expected 90• -rotational symmetry of electronic structure within each unit cell, at least down to 180• -rotational symmetry. This electronic symmetry breaking was first detected as an electronic inequivalence at the two oxygen sites within each unit cell by using a measure of nematic (C 2 ) symmetry. Incommensurate non-dispersive conductance modulations, locally breaking both rotational and translational symmetries, coexist with this intra-unit-cell electronic symmetry breaking at E = 1 . Their characteristic wavevector Q is determined by the k-space points where Bogoliubov QPI terminates and therefore changes continuously with doping. The distinct broken electronic symmetry states (intraunit-cell and finite Q) coexisting at E ∼ 1 are found to be indistinguishable in the dSC and PG phases. The next challenge for SI-STM studies is to determine the relationship of the E ∼ 1 broken symmetry electronic states with the PG phase, and with the E < 0 states associated with Cooper pairing.

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Spectroscopic Imaging STM: Atomic-Scale Visualization of Electronic Structure and Symmetry in Underdoped Cuprates

Fujita

Hamidian

Firmo

et al. 2014

Springer Series in Solid-State Sciences

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Suppression of the antinodal coherence of superconducting(Bi,Pb)2(Sr,La)

Cited by 11 publications

References 34 publications

Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-T_cSuperconductors

Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-T_cSuperconductors

Electronic structure of the cuprate superconducting and pseudogap phases from spectroscopic imaging STM

Spectroscopic Imaging STM: Atomic-Scale Visualization of Electronic Structure and Symmetry in Underdoped Cuprates

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Suppression of the antinodal coherence of superconducting(Bi,Pb)2(Sr,La)

Cited by 11 publications

References 34 publications

Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-TcSuperconductors

Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-TcSuperconductors

Electronic structure of the cuprate superconducting and pseudogap phases from spectroscopic imaging STM

Spectroscopic Imaging STM: Atomic-Scale Visualization of Electronic Structure and Symmetry in Underdoped Cuprates

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Product

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Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-T_cSuperconductors

Spectroscopic Imaging Scanning Tunneling Microscopy Studies of Electronic Structure in the Superconducting and Pseudogap Phases of Cuprate High-T_cSuperconductors