Doping-dependent charge order correlations in electron-doped cuprates

Neto, Eduardo H. da Silva; Yu, Bin; Minola, M.; Sutarto, Ronny; Schierle, E.; Boschini, Fabio; Zonno, Marta; Bluschke, Martin; Higgins, J. S.; Li, Yangmu; Yu, Guichuan; Weschke, E.; He, Feizhou; Tacon, M. Le; Greene, R. L.; Greven, M.; Sawatzky, G. A.; Keimer, B.; Damascelli, A.

doi:10.1126/sciadv.1600782

Cited by 79 publications

(139 citation statements)

References 42 publications

(78 reference statements)

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“…Theoretically this dual structure means, in the language of the 6 × 6 bosonic propagator D ab [Eq. (6) On the other hand, charge excitations were also reported by RXS 15,16 . RXS measures ω- An additional implication from the present work is that there can be a stronger tendency of bond-charge orders near q = (π, π) as seen in Fig.…”

Section: Discussionmentioning

confidence: 89%

“…The recent xray experiments for electron-doped cuprates (e-cuprates) 15,16 push the field even further. A CO occurs in an intermediate doping region and has a modulation vector along the (0, 0)-(π, 0) direction.…”

Section: Introductionmentioning

confidence: 99%

“…This question can be studied for e-cuprates, where both the CO 15,16 and high-energy charge excitations 18,19 are observed in the same system. The CO was discussed in terms of resonant x-ray scattering (RXS).…”

Section: Introductionmentioning

confidence: 99%

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Dual structure in the charge excitation spectrum of electron-doped cuprates

2017

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Motivated by the recent resonant x-ray scattering (RXS) and resonant inelastic x-ray scattering (RIXS) experiments for electron-doped cuprates, we study the charge excitation spectrum in a layered t-J model with the long-range Coulomb interaction. We show that the spectrum is not dominated by a specific type of charge excitations, but by different kinds of charge fluctuations, and is characterized by a dual structure in the energy space. Low-energy charge excitations correspond to various types of bond-charge fluctuations driven by the exchange term (J-term) whereas high-energy charge excitations are due to usual on-site charge fluctuations and correspond to plasmon excitations above the particle-hole continuum. The interlayer coupling, which is frequently neglected in many theoretical studies, is particularly important to the high-energy charge excitations.

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Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Dual structure in the charge excitation spectrum of electron-doped cuprates

2017

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“…Meanwhile, RSXS efforts in Nd 2−x Ce x CuO 4 and La 2−x Ce x CuO 4 have recently expanded these studies to the electron-doped cuprates, where they found putative CDW order in both systems [27,28]. This finding is an important step forward for understanding CDW phenomena in the high-T c cuprates.…”

Section: Introductionmentioning

confidence: 92%

“…However, at the same time, there are many aspects of the feature (described below) that are distinct from those seen in the hole-doped cuprates [5][6][7][8]16,17,[27][28][29]: (1) The doping range of the observed CDW order extends well beyond the superconducting (SC) dome [28] [see Fig. 1(a)]; (2) the CDW onset temperature is much higher than the onset temperature (T Ã ) [27][28] of the mysterious pseudogap phase [29]-in general, the onset temperature of the CDW in hole-doped cuprates is lower than T Ã [5][6][7][8]11,19] or similar to T Ã [9,22]; (3) no temperature dependence of the correlation length is observed [27,28]; (4) there is no CDW response when SC is suppressed by an external magnetic field up to 6 Tesla [28]. These distinctions from the hole-doped cuprates leave open the question of the nature and origin of the putative CDW order, as well as its universality in high-T c cuprates.…”

Section: Introductionmentioning

confidence: 97%

Superconductivity-Insensitive Order at q∼1/4 in Electron-Doped Cuprates

et al. 2017

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One of the central questions in the cuprate research is the nature of the normal state that develops into high-temperature superconductivity (HTSC). In the normal state of hole-doped cuprates, the existence of a charge density wave (CDW) is expected to shed light on the mechanism of HTSC. With evidence emerging for CDW order in the electron-doped cuprates, the CDW is thought to be a universal phenomenon in high-T c cuprates. However, the CDW phenomena in electron-doped cuprates are quite different than those in hole-doped cuprates. Here, we study the nature of the putative CDW in an electron-doped cuprate through direct comparisons between as-grown and postannealed Nd 1.86 Ce 0.14 CuO 4 (NCCO) single crystals using Cu L 3 -edge resonant soft x-ray scattering (RSXS) and angle-resolved photoemission spectroscopy (ARPES). The RSXS result reveals that the nonsuperconducting NCCO shows the same reflections at the wave vector (∼1=4, 0, l) as the reported superconducting NCCO. This superconductivity-insensitive signal is quite different from the CDW reflection in hole-doped cuprates. Moreover, the ARPES result suggests that the fermiology cannot account for such wave vectors. These results call into question the universality of the CDW phenomenon in the cuprates.

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Universal Stripe Symmetry of Short‐Range Charge Density Waves in Cuprate Superconductors

Choi,

Li,

Nag

et al. 2023

Advanced Materials

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The omnipresence of charge density waves (CDWs) across almost all cuprate families underpins a common organizing principle. However, a longstanding debate of whether its spatial symmetry is stripe or checkerboard remains unresolved. While CDWs in lanthanum‐ and yttrium‐based cuprates possess a stripe symmetry, distinguishing these two scenarios has been challenging for the short‐range CDW in bismuth‐based cuprates. Here, we employed high‐resolution resonant inelastic x‐ray scattering to uncover the spatial symmetry of the CDW in BiSrLaCuO. Across a wide range of doping and temperature, anisotropic CDW peaks with elliptical shapes were found in reciprocal space. Based on Fourier transform analysis of real‐space models, we interpret the results as evidence of unidirectional charge stripes, hosted by mutually 90‐rotated anisotropic domains. Our work paves the way for a unified symmetry and microscopic description of CDW order in cuprates.This article is protected by copyright. All rights reserved

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Doping-dependent charge order correlations in electron-doped cuprates

Abstract: Resonant x-ray scattering clarifies the link between charge order and magnetism/superconductivity in n-doped cuprates.

Cited by 79 publications

References 42 publications

Dual structure in the charge excitation spectrum of electron-doped cuprates

Dual structure in the charge excitation spectrum of electron-doped cuprates

Superconductivity-Insensitive Order at q∼1/4 in Electron-Doped Cuprates

Universal Stripe Symmetry of Short‐Range Charge Density Waves in Cuprate Superconductors

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