Core-hole screening response in two-dimensional cuprates: A high-resolution x-ray photoemission study

Koitzsch, A.; Fink, J.; Golden, M. S.; Karlsson, K.; Jepsen, O.; Gunnarsson, O.; Miller, L. L.; Eisaki, H.; Uchida, Satoshi; Yang, Guang; Abell, S.

doi:10.1103/physrevb.66.024519

Cited by 18 publications

(16 citation statements)

References 44 publications

(45 reference statements)

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“…5 [28]. The Sr 2 CuO 2 Cl 2 data are consistent with those already in the literature 27 , and exhibit a very broad main line which is clearly made up of at least three components.…”

Section: the Results Of Which Have Been Broadened With A Lorentziansupporting

confidence: 87%

“…As the oxychlorides play a special role as model substances for the HTSC, it is important to try to understand this discrepancy between theory and experiment. [27,28]. Also shown as solid lines are calculated main-line spectra from an Anderson impurity model [26,28]…”

Section: Core Level Photoemission Of Undoped 1d and 2d Cupratesmentioning

confidence: 99%

“…[27,28]. Also shown as solid lines are calculated main-line spectra from an Anderson impurity model [26,28]…”

Section: Core Level Photoemission Of Undoped 1d and 2d Cupratesmentioning

confidence: 99%

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The electronic structure of cuprates from high energy spectroscopy

Golden

Dürr

Koitzsch

et al. 2001

Journal of Electron Spectroscopy and Related Phenomena

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We report studies of the electronic structure and elementary excitations of doped and undoped cuprate chains, ladders and planes. Using high energy spectroscopies such as xray absorption, core level photoemission and angle resolved photoemission spectroscopy, important information regarding the charge distribution and hole dynamics can be obtained. The comparison of the experimental data with suitable theoretical models sets constraints on the parameters entering into the model calculations, and offers insight into the important physical quantities governing the electronic structure of these materials. Recurring themes include the importance of the dimensionality of the Cu-O network (1D 2D) and the crucial role played by the spin-background in determining the dynamics of low-lying excitations in these strongly correlated systems.

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“…5 [28]. The Sr 2 CuO 2 Cl 2 data are consistent with those already in the literature 27 , and exhibit a very broad main line which is clearly made up of at least three components.…”

Section: the Results Of Which Have Been Broadened With A Lorentziansupporting

confidence: 87%

Section: Core Level Photoemission Of Undoped 1d and 2d Cupratesmentioning

confidence: 99%

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The electronic structure of cuprates from high energy spectroscopy

Golden

Dürr

Koitzsch

et al. 2001

Journal of Electron Spectroscopy and Related Phenomena

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“…The contrasting ground states in square-planar and octahedral coordinated cuprates, i.e., T′ and T, are consequences of the difference in the charge-transfer gap Δ 0 , originating primarily from the different oxygen coordination. Vacant apical sites substantially reduce the electrostatic potential at the copper site, thus, the 3 d 9 Cu energy levels of the T′-phase are lower than in the T-phase, whereas the 2 p 6 O energy levels remain almost constant4243. A simple evaluation of the unscreened Δ 0 from Madelung potential calculations4445 show that the difference in Δ 0 between T′- and T-phases is in the range of several eV – therefore, the charge transfer gap might be very small or may even vanish in the T′-cuprates.…”

Section: Discussionmentioning

confidence: 98%

Emerging superconductivity hidden beneath charge-transfer insulators

Krockenberger

Irie

Matsumoto

et al. 2013

Sci Rep

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In many of today's most interesting materials, strong interactions prevail upon the magnetic moments, the electrons, and the crystal lattice, forming strong links between these different aspects of the system. Particularly, in two-dimensional cuprates, where copper is either five- or six-fold coordinated, superconductivity is commonly induced by chemical doping which is deemed to be mandatory by destruction of long-range antiferromagnetic order of 3d9 Cu2+ moments. Here we show that superconductivity can be induced in Pr2CuO4, where copper is four-fold coordinated. We induced this novel quantum state of Pr2CuO4 by realizing pristine square-planar coordinated copper in the copper-oxygen planes, thus, resulting in critical superconducting temperatures even higher than by chemical doping. Our results demonstrate new degrees of freedom, i.e., coordination of copper, for the manipulation of magnetic and superconducting order parameters in quantum materials.

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“…For example, Anderson impurity model would be useful to analyze the Ru 3d spectrum as applied to the Cu 2p spectrum by Koitzsch and co-workers. 13 Figure 4 shows XPS result for the Cu 2p 3/2 core level. It shows the satellite structure ͑A͒ and the main peak ͑C͒.…”

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confidence: 99%

Electronic structure ofCaCu3Ru4O12studied by x-ray photoemission spectroscopy

et al. 2006

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We have studied the electronic structure of the d-electron heavy-fermion system CaCu 3 Ru 4 O 12 using x-ray photoemission spectroscopy and a cluster model calculation. The Ru 3d core level spectrum shows a doublepeak structure as commonly observed in metallic Ru oxides. In CaCu 3 Ru 4 O 12 , the well-screened peak has dominating intensity, indicating that the Ru 4d electrons in CaCu 3 Ru 4 O 12 are highly itinerant. On the other hand, the Cu 2p 3/2 core level peak is accompanied by a satellite and shows that the valence state of Cu is close to 3d 9 ͑Cu 2+ ͒ with localized character. In addition, the main Cu 2p 3/2 peak shows an asymmetric line shape due to the screening effect, suggesting the hybridization effect between the Cu 3d and Ru 4d orbitals. The present results show that, among the d-electron heavy-fermion materials, the electronic structure of CaCu 3 Ru 4 O 12 best resembles that of the f-electron Kondo system.

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Core-hole screening response in two-dimensional cuprates: A high-resolution x-ray photoemission study

Abstract: The core hole screening response in two dimensional cuprates: a high resolution x-ray photoemission study Koitzsch

Cited by 18 publications

References 44 publications

The electronic structure of cuprates from high energy spectroscopy

The electronic structure of cuprates from high energy spectroscopy

Emerging superconductivity hidden beneath charge-transfer insulators

Electronic structure ofCaCu3Ru4O12studied by x-ray photoemission spectroscopy

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