Stabilization of three-dimensional charge order in YBa2Cu3O6+x via epitaxial growth

Bluschke, Martin; Frañó, Alex; Schierle, E.; Putzky, Daniel; Ghorbani, F.; Ortiz, R. A.; Suzuki, H.; Christiani, G.; Логвенов, Г.; Weschke, E.; Birgeneau, R. J.; Neto, Eduardo H. da Silva; Minola, M.; Blanco-Canosa, S.; Keimer, B.

doi:10.1038/s41467-018-05434-8

Cited by 44 publications

(37 citation statements)

References 42 publications

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“…Beyond the interplay with nematic order, the existence of dynamic correlations over such a large circular manifold in momentum space should have other far-reaching consequences. For example, the intense three-dimensional CO peak in YBCO induced by external perturbations shows no evidence of spectral weight conservation [55][56][57][58] . Where does all the three-dimensional CO intensity come from?…”

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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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: 99%

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

et al. 2021

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“…This state may be favored by the electronically active Cu-O chains in the YBa 2 Cu 3 O 6+x crystal structure, which generate an additional open sheet of the Fermi surface that is not present in most other cuprates. 76 The complex electronic structure generated by the CuO chains, its modification by uniaxial or epitaxial strain, and its influence on charge ordering phenomena are interesting subjects of future theoretical and experimental research.…”

Section: Dimensionalitymentioning

confidence: 99%

“…In particular, the high sensitivity of RXS allows measurements on films that are only a few unit cells thick and thus adopt the lattice structure of the underlying substrate. For instance, RXS experiments on thin YBa 2 Cu 3 O 6+x films with a tetragonal structure imposed by the SrTiO 3 substrate uncovered a robust 3D charge-ordered state that is not present in bulk YBa 2 Cu 3 O 6+x under ambient conditions 76 (Fig. 3(d)).…”

Section: G Outlookmentioning

confidence: 99%

Charge ordering in superconducting copper oxides

Frañó

Blanco-Canosa

Keimer

et al. 2020

J. Phys.: Condens. Matter

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Charge order has recently been identified as a leading competitor of high-temperature superconductivity in moderately doped cuprates. We provide a survey of universal and materials-specific aspects of this phenomenon, with emphasis on results obtained by scattering methods. In particular, we discuss the structure, periodicity, and stability range of the charge-ordered state, its response to various external perturbations, the influence of disorder, the coexistence and competition with superconductivity, as well as collective charge dynamics. In the context of this journal issue which honors Roger Cowley's legacy, we also discuss the connection of charge ordering with lattice vibrations and the central-peak phenomenon. We end the review with an outlook on research opportunities offered by new synthesis methods and experimental platforms, including cuprate thin films and superlattices. A. Introduction.

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“…The ideal behavior predicted by the Schottky-Mott limit was restored by the control of interfacial defects at a metal-semiconductor junction (16). The balance between competing phases in strongly correlated electronic materials, such as high-temperature superconductors and Mott insulators, is highly dependent on the presence and type of electronic disorder (17)(18)(19)(20)(21). Inhomogeneities in the energy of electronic states also provide both challenges and opportunities for quantum applications such as quantum information-processing and superfluorescence (22,23).…”

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confidence: 99%

Atomic fluctuations in electronic materials revealed by dephasing

Palato

Seiler

Nijjar

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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The microscopic origin and timescale of the fluctuations of the energies of electronic states has a significant impact on the properties of interest of electronic materials, with implication in fields ranging from photovoltaic devices to quantum information processing. Spectroscopic investigations of coherent dynamics provide a direct measurement of electronic fluctuations. Modern multidimensional spectroscopy techniques allow the mapping of coherent processes along multiple time or frequency axes and thus allow unprecedented discrimination between different sources of electronic dephasing. Exploiting modern abilities in coherence mapping in both amplitude and phase, we unravel dissipative processes of electronic coherences in the model system of CdSe quantum dots (QDs). The method allows the assignment of the nature of the observed coherence as vibrational or electronic. The expected coherence maps are obtained for the coherent longitudinal optical (LO) phonon, which serves as an internal standard and confirms the sensitivity of the technique. Fast dephasing is observed between the first two exciton states, despite their shared electron state and common environment. This result is contrary to predictions of the standard effective mass model for these materials, in which the exciton levels are strongly correlated through a common size dependence. In contrast, the experiment is in agreement with ab initio molecular dynamics of a single QD. Electronic dephasing in these materials is thus dominated by the realistic electronic structure arising from fluctuations at the atomic level rather than static size distribution. The analysis of electronic dephasing thereby uniquely enables the study of electronic fluctuations in complex materials.

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Stabilization of three-dimensional charge order in YBa2Cu3O6+x via epitaxial growth

Cited by 44 publications

References 42 publications

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

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

Charge ordering in superconducting copper oxides

Atomic fluctuations in electronic materials revealed by dephasing

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