Buckling of the CuO2 planes and the electronic properties of doped La2CuO4 superconductors

Büchner, B.; Freimuth, A.; Breuer, M.; Lang, Amy; Micklitz, H.; Kampf, Arno P.

doi:10.1016/0921-4534(94)91838-4

Cited by 11 publications

(14 citation statements)

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“…Recently, x-ray scattering experiments on highly ordered Y-based cuprates have discovered that in the same range of hole concentration (near x = 1/8), there is a competing charge organization with an incommensurate ordering vector (≈ 3.3a periodicity) (3,4). These experiments raise the question of whether there is a universal CO mechanism common to all underdoped cuprates [although crystalline structures in each compound may modify details of the resulting ordering patterns (5,6)]. If there is a connection between the observed COs in different compounds, what is the mechanism by which this phenomenon competes or is intertwined with high-T c superconductivity (7)?…”

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confidence: 99%

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Ubiquitous Interplay Between Charge Ordering and High-Temperature Superconductivity in Cuprates

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Aynajian

Frañó

et al. 2014

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Besides superconductivity, copper-oxide high-temperature superconductors are susceptible to other types of ordering. We used scanning tunneling microscopy and resonant elastic x-ray scattering measurements to establish the formation of charge ordering in the high-temperature superconductor Bi2Sr2CaCu2O(8+x). Depending on the hole concentration, the charge ordering in this system occurs with the same period as those found in Y-based or La-based cuprates and displays the analogous competition with superconductivity. These results indicate the similarity of charge organization competing with superconductivity across different families of cuprates. We observed this charge ordering to leave a distinct electron-hole asymmetric signature (and a broad resonance centered at +20 milli-electron volts) in spectroscopic measurements, indicating that it is likely related to the organization of holes in a doped Mott insulator.

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“…Department of Physics and Astronomy, University of British Columbia (UBC), Vancouver, British Columbia V6T 1Z1, Canada 5. Condensed Matter Physics and Materials Science, Brookhaven National Laboratory (BNL), Upton, NY 11973 USA 6. Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA.…”

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confidence: 99%

Ubiquitous Interplay Between Charge Ordering and High-Temperature Superconductivity in Cuprates

Neto

Aynajian

Frañó

et al. 2014

Science

599

617

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“…This is a clear indication of the relative stiffness of the Cu-O 2 layers in the cuprate structure. On the other hand, the buckling angle, 36 the angle that measures the separation of the copper from the oxygen plane in the [Cu-O 5 ] pyramid, is on the order of 7°, a little higher than that in the ruthenium analogue, where it is 5°. Yet, this is neither a sufficient nor a necessary condition for superconductivity because, for example, the mercury cuprates have flat copper-oxygen planes.…”

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New Materials Derived from Ybco: CrSr₂RECu₂O₈ (RE = La, Pr, Nd, Eu, Gd, Tb, Dy, Y, Ho, Er, Lu)

2005

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Eleven new oxides, derived from yttrium barium copper oxide by replacing the square-planar copper [Cu-O4] of the basal plane of the triple perovskite-based structure with octahedral Cr(IV), have been prepared at high pressure and temperature. Their crystal structures have been determined, and their complex microstructure has been established by means of high-resolution electron microscopy and electron diffraction. The materials have a general formula of CrSr2RECu2O8 (RE = La, Pr, Nd, Eu, Gd, Tb, Dy, Y, Ho, Er, and Lu); they are tetragonal, show the symmetry of space group P4/mmm, and do not appear to be superconducting.

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“…Furthermore, the ultrathin superconducting LSCO layers are sandwiched between non‐superconducting manganites, which can lead to a buckling of the CuO 2 planes. [ 29 ] In addition, the in situ RHEED pattern indicates the presence of four streaks (Figure S3, Supporting Information), [ 30 ] which depict a 5×5 super structured oxygen ordering, [ 20 ] typically associated with the presence of superconductivity in optimally doped LSCO. Our findings allow us to combine the microscopic information of sharp LSCO structures with the macroscopic evidence for a clean and optimally doped LSCO unit cell in direct proximity to an insulating phase.…”

Section: Resultsmentioning

confidence: 99%

Superconductivity at Interfaces in Cuprate‐Manganite Superlattices

et al. 2023

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One of the unsolved problems for using high-T c superconducting cuprates for spintronic applications are the short coherence lengths of Cooper pairs in oxides (a few Å), which requires atomically sharp and defect-free interfaces. This research demonstrates the presence of high-T c superconducting La 1.84 Sr 0.16 CuO 4 in direct proximity to SrLaMnO 4 and provides evidence for the sharpness of interfaces between the cuprate and the manganite layers at the atomic scale. These findings shed light on the impact of the chemical potential at the interface of distinct materials on highly sensitive physical properties, such as superconductivity. Additionally, this results show the high stability of ultrathin layers from the same K 2 NiF 4 -type family, specifically one unit cell of Sr 2−x La x MnO 4 and three unit cells of La 1.84 Sr 0.16 CuO 4 . This work advances both the fundamental understanding of the proximity region between superconducting cuprates and manganite phases and the potential use of oxide-based materials in quantum computing.

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Buckling of the CuO2 planes and the electronic properties of doped La2CuO4 superconductors

Cited by 11 publications

References 10 publications

Ubiquitous Interplay Between Charge Ordering and High-Temperature Superconductivity in Cuprates

Ubiquitous Interplay Between Charge Ordering and High-Temperature Superconductivity in Cuprates

New Materials Derived from Ybco: CrSr₂RECu₂O₈ (RE = La, Pr, Nd, Eu, Gd, Tb, Dy, Y, Ho, Er, Lu)

Superconductivity at Interfaces in Cuprate‐Manganite Superlattices

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Buckling of the CuO2 planes and the electronic properties of doped La2CuO4 superconductors

Cited by 11 publications

References 10 publications

Ubiquitous Interplay Between Charge Ordering and High-Temperature Superconductivity in Cuprates

Ubiquitous Interplay Between Charge Ordering and High-Temperature Superconductivity in Cuprates

New Materials Derived from Ybco: CrSr2RECu2O8 (RE = La, Pr, Nd, Eu, Gd, Tb, Dy, Y, Ho, Er, Lu)

Superconductivity at Interfaces in Cuprate‐Manganite Superlattices

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Product

Resources

About

New Materials Derived from Ybco: CrSr₂RECu₂O₈ (RE = La, Pr, Nd, Eu, Gd, Tb, Dy, Y, Ho, Er, Lu)