Dynamic electron correlations with charge order wavelength along all directions in the copper oxide plane

Boschini, Fabio; Minola, M.; Sutarto, Ronny; Schierle, E.; Bluschke, Martin; Das, Sanjib; Yang, Yi-feng; Michiardi, Matteo; Shao, Yu‐Cheng; Feng, Xuefei; Ono, Shimpei; Zhong, Ruidan; Schneeloch, John; Gu, Genda; Weschke, E.; He, Feizhou; Chuang, Y. D.; Keimer, B.; Damascelli, A.; Frañó, Alex; Neto, Eduardo H. da Silva

doi:10.1038/s41467-020-20824-7

Cited by 30 publications

(31 citation statements)

References 59 publications

(89 reference statements)

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“…Because its width is comparable to its energy, it is appropriate to say that this acoustic plasmon is highly damped. Further, RIXS measurements of Bi-2212 at larger momenta, q ∼ 0.4 r.l.u., observe broad isotropic charge fluctuations that are consistent with the continuum observed with M-EELS [22]. Together, optics, RIXS, and M-EELS give a consistent picture that BSCCO exhibits a highly damped plasmon for small momenta, q < 0.12 r.l.u., and an MFLlike continuum everywhere else in momentum space.…”

Section: Consistency Between M-eels Optics and Rixssupporting

confidence: 77%

Crossover of Charge Fluctuations across the Strange Metal Phase Diagram

et al. 2019

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A normal metal exhibits a valence plasmon, which is a sound wave in its conduction electron density. The mysterious strange metal is characterized by non-Boltzmann transport and violates most fundamental Fermi liquid scaling laws. A fundamental question is: Do strange metals have plasmons? Using momentum-resolved inelastic electron scattering (M-EELS) we recently showed that, rather than a plasmon, optimally-doped Bi2.1Sr1.9Ca1.0Cu2.0O8+x (Bi-2212) exhibits a featureless, temperature-independent continuum with a power-law form over most energy and momentum scales [M. Mitrano, PNAS 115, 5392-5396 (2018)]. Here, we show that this continuum is present throughout the fan-shaped, strange metal region of the phase diagram. Outside this region, dramatic changes in spectral weight are observed: In underdoped samples, spectral weight up to 0.5 eV is enhanced at low temperature, biasing the system towards a charge order instability. The situation is reversed in the overdoped case, where spectral weight is strongly suppressed at low temperature, increasing quasiparticle coherence in this regime. Optimal doping corresponds to the boundary between these two opposite behaviors at which the response is temperature-independent. Our study suggests that plasmons do not exist as well-defined excitations in Bi-2212, and that a featureless continuum is a defining property of the strange metal, which is connected to a peculiar crossover where the spectral weight change undergoes a sign reversal. arXiv:1903.04038v2 [cond-mat.str-el]

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Section: Consistency Between M-eels Optics and Rixssupporting

confidence: 77%

Crossover of Charge Fluctuations across the Strange Metal Phase Diagram

et al. 2019

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“…From this, we conclude that the data is consistent with a CDW with an in-plane propagation vector of ( δ , 0) as observed in other cuprates. A high-energy (500 < E < 900 meV) inelastic ring-like feature in ( H , K ) was observed in Bi 2 Sr 2 CaCu 2 O 8+ δ , which was interpreted as evidence for dynamical charge fluctuations 35 . We find no evidence for a feature like this in our ζ scans (see Supplementary Note 3 and Supplementary Fig.…”

Section: Resultsmentioning

confidence: 91%

Charge density waves and Fermi surface reconstruction in the clean overdoped cuprate superconductor Tl2Ba2CuO6+δ

Zhu

Ayres

et al. 2022

Nat Commun

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Hall effect and quantum oscillation measurements on high temperature cuprate superconductors show that underdoped compositions have small Fermi surface pockets whereas when heavily overdoped, a single much larger pocket is found. The origin of this change in electronic structure has been unclear, but may be related to the high temperature superconductivity. Here we show that the clean overdoped single-layer cuprate Tl2Ba2CuO6+δ (Tl2201) displays CDW order with a remarkably long correlation length ξ ≈ 200 Å which disappears above a hole doping of pCDW ≈ 0.265. We show that the evolution of the electronic properties of Tl2201 as the doping is lowered may be explained by a Fermi surface reconstruction which accompanies the emergence of the CDW below pCDW. Our results demonstrate importance of CDW correlations in understanding the electronic properties of overdoped cuprates.

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“…However, the interplay between correlation effects at short distances and Coulomb repulsion at long distances may well result in an incommensurate CDW with nontrivial doping dependence (see for instance refs. 67 – 69 ). In any event, it is important to realise that we are not opposing a locally commensurate modulation that has discommensurations and a “genuinely” incommensurate wave that has a perfectly sinusoidal modulation.…”

Section: Discussionmentioning

confidence: 99%

Locally commensurate charge-density wave with three-unit-cell periodicity in YBa2Cu3Oy

et al. 2021

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In order to identify the mechanism responsible for the formation of charge-density waves (CDW) in cuprate superconductors, it is important to understand which aspects of the CDW’s microscopic structure are generic and which are material-dependent. Here, we show that, at the local scale probed by NMR, long-range CDW order in YBa2Cu3Oy is unidirectional with a commensurate period of three unit cells (λ = 3b), implying that the incommensurability found in X-ray scattering is ensured by phase slips (discommensurations). Furthermore, NMR spectra reveal a predominant oxygen character of the CDW with an out-of-phase relationship between certain lattice sites but no specific signature of a secondary CDW with λ = 6b associated with a putative pair-density wave. These results shed light on universal aspects of the cuprate CDW. In particular, its spatial profile appears to generically result from the interplay between an incommensurate tendency at long length scales, possibly related to properties of the Fermi surface, and local commensuration effects, due to electron-electron interactions or lock-in to the lattice.

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Dynamic electron correlations with charge order wavelength along all directions in the copper oxide plane

Cited by 30 publications

References 59 publications

Crossover of Charge Fluctuations across the Strange Metal Phase Diagram

Crossover of Charge Fluctuations across the Strange Metal Phase Diagram

Charge density waves and Fermi surface reconstruction in the clean overdoped cuprate superconductor Tl2Ba2CuO6+δ

Locally commensurate charge-density wave with three-unit-cell periodicity in YBa2Cu3Oy

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