Two-Electron Resonance at the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>3</mml:mn><mml:mi>p</mml:mi></mml:math>Threshold of Cu and Ni

Iwan, M.; Himpsel, F. J.; East̀man, D. E.

doi:10.1103/physrevlett.43.1829

Cited by 185 publications

(32 citation statements)

References 12 publications

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“…Furthermore the corresponding satellite structures are located at energies between 10 eV and 15 eV below E F , well outside our range of observations (57). The core level excitation thresholds of the Cu 3p and 3s core electrons are located at 75.0 eV, 77.7 eV and 122.4 eV.…”

Section: Sample Preparation and Orientationsupporting

confidence: 74%

Angle resolved photoemission from Cu single crystals: Known facts and a few surprises about the photoemission process

Roth

Lupulescu

Darlatt

et al. 2016

Journal of Electron Spectroscopy and Related Phenomena

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We present angle resolved photoemission spectra for Cu(100) and Cu(111) singly crystals in normal emission geometry, taken at tightly spaced intervals for photon energies between 8 eV and 150 eV. This systematic collection of spectra gives unprecedented insight into the influence of the final states to the photoemission process as well as the band structure and lifetimes of highly excited electrons in Cu.

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Section: Sample Preparation and Orientationsupporting

confidence: 74%

Angle resolved photoemission from Cu single crystals: Known facts and a few surprises about the photoemission process

Roth

Lupulescu

Darlatt

et al. 2016

Journal of Electron Spectroscopy and Related Phenomena

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“…It is well known that the Cu3p core levels locate around -75 eV [4,5,6,7], and we observed them at -76.7 and -75.1 eV in our OD71 sample. Thus, one can expect that such photon energy would enhance the direct transition Cu3p 6 3d 9 +hν→Cu3p 6 3d 8 +e − due to an interference with a super Coster-Kronig Auger decay process described by Cu3p 6 3d 9 +hν→Cu3p 5 3d 10 →Cu3p 6 3d 8 +e…”

supporting

confidence: 61%

Nature of oxygen dopant-induced states in high-temperatureBi2Sr2CaCu2O8+
Richard¹,
Pan²,
Neupane³
et al. 2006
Phys. Rev. B
14
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8
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We have performed an angular-resolved photoemission study of underdoped, optimally doped and overdoped Bi2Sr2CaCu2O8+x samples using a wide photon energy range (15 -100 eV). We report a small and broad non-dispersive A1g peak in the energy distribution curves whose intensity scales with doping. We attribute it to a local impurity state similar to the one observed recently by scanning tunneling spectroscopy and identified as the oxygen dopants. Detailed analysis of the resonance profile and comparison with the single-layered Bi2Sr2CuO6+x suggest a mixing of this local state with Cu via the apical oxygens.PACS numbers: 74.72. Hs, 74.25.Jb, In contrast to pure systems, the carrier density of the CuO 2 planes in the cuprates can only be modified by creating nonstoichiometric defects in the parent compounds. For example, Bi 2 Sr 2 CaCu 2 O 8+x (Bi2212) is hole-doped mainly by the introduction of an extraneous amount of oxygens, which is estimated to be around x=0.16 per formula unit for the T c = 95 K optimally doped samples [1]. Such dopants have long been suspected to induce local electronic disorder [2]. However, it is only recently that scanning tunneling spectroscopy (STS) measurements established their in-plane positions in the structure by correlating the STS spectra to the local electronic disorder as a function of doping [3]. In particular, the differential conductance at the oxygen dopant (O δ ) site is characterized by a broad peak around -0.96 eV. This peak is observed in ∼ 8Å diameter regions and their number is found to be proportional to doping [3]. Surprisingly, larger superconducting gap magnitudes accompanied with the absence of coherent peaks are observed in these regions, suggesting that the O δ are correlated to the CuO 2 planes electronic properties. Due to the importance of this issue, it is necessary to confirm the existence of that coupling and to investigate further the local impact of the O δ . Owing to its complementarity with STS, APRES is certainly an appropriate tool to investigate this issue. More importantly, the atomic selectivity of the resonant ARPES measurement provides unique and valuable insight concerning the wavefunction of the states of interest. When the incident photon energy is tunned to near an absorption edge of a specific element, a resonance (strong enhancement of photoelectron emission) usually occurs for certain valence spectral features that involve this element. This "element-resolved" capability may shed light on the nature of wavefunctions at the O δ * Electronic address: richarpi@bc.edu site and its influence to local superconducting properties.In this letter, we present an ARPES study of Bi2212 which reveals a small, broad and non-dispersing peak corresponding to a localized state analogous to the one reported recently by STS at -0.96 eV [3]. We show that the spectral weight of the corresponding ARPES peak increases with doping, thus reinforcing its relation to the presence of O δ . In order to characterize further this feature, we report measurements obtained ...

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“…However, other factors apart from the degree of hybridization, such as the presence of multielectron resonant satellites, may affect the valence-band resonance. 34,35 In addition, overlapping intensity variations due to the appearance of MVV Auger transitions may contribute at the bottom of the band. 28 Nevertheless, the trend in the resonant photoemission results for Co 2 MnSn is analogous to that obtained for Ni 2 10 The resulting theoretically derived PDOS's were convoluted and normalized using the same procedure as that outlined for Co 2 MnSn.…”

Section: Resultsmentioning

confidence: 99%

Photoelectron spectroscopy of manganese-based Heusler alloys

et al. 1998

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Two-Electron Resonance at the3pThreshold of Cu and Ni

Cited by 185 publications

References 12 publications

Angle resolved photoemission from Cu single crystals: Known facts and a few surprises about the photoemission process

Angle resolved photoemission from Cu single crystals: Known facts and a few surprises about the photoemission process

Nature of oxygen dopant-induced states in high-temperatureBi2Sr2CaCu2O8+
Richard¹,
Pan²,
Neupane³
et al. 2006
Phys. Rev. B
14
0
8
0
View full text Add to dashboard Cite

Photoelectron spectroscopy of manganese-based Heusler alloys

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Two-Electron Resonance at the3pThreshold of Cu and Ni

Cited by 185 publications

References 12 publications

Angle resolved photoemission from Cu single crystals: Known facts and a few surprises about the photoemission process

Angle resolved photoemission from Cu single crystals: Known facts and a few surprises about the photoemission process

Nature of oxygen dopant-induced states in high-temperatureBi2Sr2CaCu2O8+Richard1, Pan2, Neupane3 et al. 2006Phys. Rev. B14080View full textAdd to dashboardCite

Photoelectron spectroscopy of manganese-based Heusler alloys

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Nature of oxygen dopant-induced states in high-temperatureBi2Sr2CaCu2O8+
Richard¹,
Pan²,
Neupane³
et al. 2006
Phys. Rev. B
14
0
8
0
View full text Add to dashboard Cite