Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor

Charge density modulations have been observed in all families of high–critical temperature (Tc) superconducting cuprates. Although they are consistently found in the underdoped region of the phase diagram and at relatively low temperatures, it is still unclear to what extent they influence the unusual properties of these systems. Using resonant x-ray scattering, we carefully determined the temperature dependence of charge density modulations in YBa2Cu3O7–δ and Nd1+xBa2–xCu3O7–δ for several doping levels. We isolated short-range dynamical charge density fluctuations in addition to the previously known quasi-critical charge density waves. They persist up to well above the pseudogap temperature T*, are characterized by energies of a few milli–electron volts, and pervade a large area of the phase diagram.

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Dynamical charge density waves rule the phase diagram of cuprates

Physical Review B ◽

10.1103/physrevb.95.224511 ◽

2017 ◽

Vol 95 (22) ◽

Cited By ~ 38

Author(s):

S. Caprara ◽

C. Di Castro ◽

G. Seibold ◽

M. Grilli

Keyword(s):

Phase Diagram ◽

Charge Density ◽

Charge Density Waves ◽

Density Waves ◽

Dynamical Charge

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Strange metal behaviour from charge density fluctuations in cuprates

Communications Physics ◽

10.1038/s42005-020-00505-z ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Götz Seibold ◽

Riccardo Arpaia ◽

Ying Ying Peng ◽

Roberto Fumagalli ◽

Lucio Braicovich ◽

...

Keyword(s):

Charge Density ◽

Charge Density Waves ◽

Density Fluctuations ◽

Metallic State ◽

Microscopic Mechanism ◽

Correlation Lengths ◽

New Class ◽

X Ray Scattering ◽

Liquid Theory ◽

Marginal Fermi Liquid

AbstractBesides 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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Charge Density Waves in YBa2Cu3O6.67 Probed by Resonant X-Ray Scattering under Uniaxial Compression

Physical Review Letters ◽

10.1103/physrevlett.126.037002 ◽

2021 ◽

Vol 126 (3) ◽

Author(s):

H.-H. Kim ◽

E. Lefrançois ◽

K. Kummer ◽

R. Fumagalli ◽

N. B. Brookes ◽

...

Keyword(s):

Charge Density ◽

Uniaxial Compression ◽

Charge Density Waves ◽

Density Waves ◽

X Ray ◽

X Ray Scattering ◽

Ray Scattering

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Bipolaronic Charge Density Waves, Polaronic Spin Density Waves and High Tc Superconductivity

NATO ASI Series - Future Directions of Nonlinear Dynamics in Physical and Biological Systems ◽

10.1007/978-1-4899-1609-9_46 ◽

1993 ◽

pp. 265-265

Author(s):

Serge Aubry

Keyword(s):

Charge Density ◽

Spin Density ◽

Charge Density Waves ◽

Density Waves ◽

Spin Density Waves ◽

High Tc ◽

High Tc Superconductivity

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Vortex core states in high-Tc superconductors with induced incommensurate spin and charge density waves

Physica C Superconductivity ◽

10.1016/j.physc.2005.01.016 ◽

2005 ◽

Vol 426-431 ◽

pp. 28-35 ◽

Cited By ~ 1

Author(s):

Masanori Ichioka ◽

Mitsuaki Takigawa ◽

Kazushige Machida

Keyword(s):

Charge Density ◽

Vortex Core ◽

Charge Density Waves ◽

Density Waves ◽

High Tc Superconductors ◽

High Tc

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Pair-density waves, charge-density waves, and vortices in high- Tc cuprates

Physical Review B ◽

10.1103/physrevb.97.174511 ◽

2018 ◽

Vol 97 (17) ◽

Cited By ~ 26

Author(s):

Zhehao Dai ◽

Ya-Hui Zhang ◽

T. Senthil ◽

Patrick A. Lee

Keyword(s):

Charge Density ◽

Charge Density Waves ◽

Density Waves ◽

High Tc ◽

Pair Density ◽

High Tc Cuprates

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Multiorbital charge-density wave excitations and concomitant phonon anomalies in Bi2Sr2LaCuO6+δ

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.2001755117 ◽

2020 ◽

Vol 117 (28) ◽

pp. 16219-16225 ◽

Cited By ~ 2

Author(s):

Jiemin Li ◽

Abhishek Nag ◽

Jonathan Pelliciari ◽

Hannah Robarts ◽

Andrew Walters ◽

...

Keyword(s):

Charge Density ◽

Cuprate Superconductors ◽

Density Wave ◽

Charge Density Waves ◽

Valence Electron Density ◽

X Ray Scattering ◽

Bond Stretching ◽

Comprehensive Picture ◽

Strong Hybridization ◽

Orbital Character

Charge-density waves (CDWs) are ubiquitous in underdoped cuprate superconductors. As a modulation of the valence electron density, CDWs in hole-doped cuprates possess both Cu-3dand O-2porbital character owing to the strong hybridization of these orbitals near the Fermi level. Here, we investigate underdoped Bi2Sr1.4La0.6CuO6+δusing resonant inelastic X-ray scattering (RIXS) and find that a short-range CDW exists at both Cu and O sublattices in the copper-oxide (CuO2) planes with a comparable periodicity and correlation length. Furthermore, we uncover bond-stretching and bond-buckling phonon anomalies concomitant to the CDWs. Comparing to slightly overdoped Bi2Sr1.8La0.2CuO6+δ, where neither CDWs nor phonon anomalies appear, we highlight that a sharp intensity anomaly is induced in the proximity of the CDW wavevector (QCDW) for the bond-buckling phonon, in concert with the diffused intensity enhancement of the bond-stretching phonon at wavevectors much greater than QCDW. Our results provide a comprehensive picture of the quasistatic CDWs, their dispersive excitations, and associated electron-phonon anomalies, which are key for understanding the competing electronic instabilities in cuprates.

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d-Wave Superconductivity and s-Wave Charge Density Waves: Coexistence between Order Parameters of Different Origin and Symmetry

Symmetry ◽

10.3390/sym3040699 ◽

2011 ◽

Vol 3 (4) ◽

pp. 699-749 ◽

Cited By ~ 12

Author(s):

Toshikazu Ekino ◽

Alexander M. Gabovich ◽

Mai Suan Li ◽

Marek Pękała ◽

Henryk Szymczak ◽

...

Keyword(s):

Charge Density ◽

Charge Density Waves ◽

Order Parameters ◽

Density Waves ◽

S Wave ◽

High Tc ◽

Energy Gaps ◽

Theoretical Predictions ◽

Different Origin ◽

D Wave

A review of the theory describing the coexistence between d-wave superconductivity and s-wave charge-density-waves (CDWs) is presented. The CDW gapping is identified with pseudogapping observed in high-Tc oxides. According to the cuprate specificity, the analysis is carried out for the two-dimensional geometry of the Fermi surface (FS). Phase diagrams on the σ0 − α plane—here, σ0 is the ratio between the energy gaps in the parent pure CDW and superconducting states, and the quantity 2α is connected with the degree of dielectric (CDW) FS gapping—were obtained for various possible configurations of the order parameters in the momentum space. Relevant tunnel and photoemission experimental data for high-Tc oxides are compared with theoretical predictions. A brief review of the results obtained earlier for the coexistence between s-wave superconductivity and CDWs is also given.

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