Unusual Dynamic Charge Correlations in Simple-Tetragonal 
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Yu, Bin; Tabiś, Wojciech; Bialo, I.; Yakhou, F.; Brookes, N. B.; Anderson, Zach; Tang, Yanting; Yu, Guichuan; Greven, M.

doi:10.1103/physrevx.10.021059

Cited by 25 publications

(26 citation statements)

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“…Note that static STS measurements do not report a ring-like glassy structure in Bi2212. In Hg-cuprates, moreover, dynamic CO signals above 70 K also extend to 200 meV and possibly higher 37 . These higher scales observed in NCCO and Hg-cuprates are not only consistent with our measurements but also represent an energy range more compatible with strong correlation physics.…”

Section: Discussionmentioning

confidence: 98%

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

et al. 2021

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In strongly correlated systems the strength of Coulomb interactions between electrons, relative to their kinetic energy, plays a central role in determining their emergent quantum mechanical phases. We perform resonant x-ray scattering on Bi2Sr2CaCu2O8+δ, a prototypical cuprate superconductor, to probe electronic correlations within the CuO2 plane. We discover a dynamic quasi-circular pattern in the x-y scattering plane with a radius that matches the wave vector magnitude of the well-known static charge order. Along with doping- and temperature-dependent measurements, our experiments reveal a picture of charge order competing with superconductivity where short-range domains along x and y can dynamically rotate into any other in-plane direction. This quasi-circular spectrum, a hallmark of Brazovskii-type fluctuations, has immediate consequences to our understanding of rotational and translational symmetry breaking in the cuprates. We discuss how the combination of short- and long-range Coulomb interactions results in an effective non-monotonic potential that may determine the quasi-circular pattern.

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Section: Discussionmentioning

confidence: 98%

“…Over the last few years, RIXS measurements have revealed dynamic correlations associated with CO in various cuprate families 22,[34][35][36][37][38] . However, while their detailed relationship to this work remains an open question to be resolved by future φ-dependent RIXS measurements, a comparison among them reveals deep connections.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2021

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“…A step forward in the identification of low energy excitations that might be responsible for the strange-metal behaviour was recently taken by means of resonant X-ray scattering (RXS), performed on Nd 1+x Ba 2−x Cu 3 O 7−δ (NBCO) and YBa 2 Cu 3 O 7−δ (YBCO) thin films 12 . After the first experimental evidence, these excitations have been demonstrated to be a common feature of different families of cuprates, namely HgBa 2 CuO 4+δ 13 , La 2−x Sr x CuO 4 [14][15][16] , La 2−x Ba x CuO 4 17,18 , and La 1.675 Eu 0.2 Sr 0.125 CuO 4 19 , thereby indicating that these excitations may well provide a generic scattering mechanism in all cuprates.…”

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confidence: 99%

Strange metal behaviour from charge density fluctuations in cuprates

Seibold¹,

Arpaia

Peng

et al. 2021

Commun Phys

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Besides the mechanism responsible for high critical temperature superconductivity, the grand unresolved issue of the cuprates is the occurrence of a strange metallic state above the so-called pseudogap temperature T*. Even though such state has been successfully described within a phenomenological scheme, the so-called Marginal Fermi-Liquid theory, a microscopic explanation is still missing. However, recent resonant X-ray scattering experiments identified a new class of charge density fluctuations characterized by low characteristic energies and short correlation lengths, which are related to the well-known charge density waves. These fluctuations are present over a wide region of the temperature-vs-doping phase diagram and extend well above T*. Here we investigate the consequences of charge density fluctuations on the electron and transport properties and find that they can explain the strange metal phenomenology. Therefore, charge density fluctuations are likely the long-sought microscopic mechanism underlying the peculiarities of the metallic state of cuprates.

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“…By taking advantage of the superior sensitivity of modern Resonant Inelastic X-ray Scattering (RIXS) facilities, several studies have been done on different cuprate families, by thoroughly investigating the temperature and doping dependence of charge order. The result is that charge density modulations, with a shorter correlation length with respect to low temperature CDW, are present at any investigated temperature and in a broad doping range [43][44][45][46][47][48][49][50][51][52][53]. Consequently, they persist at temperatures exceeding not only the previously-defined T CDW , but also T * .…”

Section: Introductionmentioning

confidence: 99%

“…In view of these experimental results, the T -p phase diagram gets profoundly reshaped: in order to explain the different orders and regions characterizing it, one cannot ignore the presence of these pervasive high temperature charge fluctuations. Several proposals, linking these fluctuations either to the superconducting pairing mechanism [44] or to the strange metal phase [54,55], have already been formulated.…”

Section: Introductionmentioning

confidence: 99%