Exchange splitting of the three<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>Γ</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:math>surface states of Ni(111) from three-dimensional spin- and angle-resolved photoemission spectroscopy

Okuda, Takashi; Lobo-Checa, Jorge; Auwärter, Willi; Morscher, Martin; Hoesch, Moritz; Petrov, V. N.; Hengsberger, Matthias; Tamai, Anna; Cirelli, Claudio; Corso, Martina; Muntwiler, Matthias; Klöckner, Martin; Roos, M.; Osterwalder, Jürg; Greber, Thomas

doi:10.1103/physrevb.80.180404

Cited by 19 publications

(28 citation statements)

References 23 publications

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“…In 74 For photon energies below hν = 46 eV, this state appears as a single shoulder in both theory and experiment while at higher photon energies it can be distinguished as a sharp feature. It strongly overlaps with the bulk bands of the same symmetry leading to an intense surface resonance structure in almost the complete Ni BBZ.…”

Section: Resultsmentioning

confidence: 99%

Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra:An experimental and theoretical study

Sánchez-Barriga

Braun²,

Minář³

et al. 2012

Phys. Rev. B

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We have investigated the spin-dependent quasiparticle lifetimes and the strength of electron correlation effects in the ferromagnetic 3d transition metals Fe, Co, and Ni by means of spin-and angle-resolved photoemission spectroscopy. The experimental data are accompanied by state-of-the-art many-body calculations within the dynamical mean-field theory and the three-body scattering approximation, including fully relativistic calculations of the photoemission process within the one-step model. Our quantitative analysis reveals that inclusion of local many-body Coulomb interactions are of ultimate importance for a realistic description of correlation effects in ferromagnetic 3d transition metals. However, we found that more sophisticated many-body calculations with larger modifications in the case of Fe and Co are still needed to improve the quantitative agreement between experiment and theory. In general, it turned out that not only the dispersion behavior of energetic structures should be affected by nonlocal correlations but also the line widths of most of the photoemission peaks are underestimated by the current theoretical approaches. The increasing values of the on-site Coulomb interaction parameter U and the band narrowing of majority spin states obtained when moving from Fe to Ni indicate that the effect of nonlocal correlations becomes weaker with increasing atomic number, whereas correlation effects tend to be stronger.

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Section: Resultsmentioning

confidence: 99%

Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra:An experimental and theoretical study

Sánchez-Barriga

Braun²,

Minář³

et al. 2012

Phys. Rev. B

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“…In addition, surface states on a Ni(111) surface are anticipated to be spin polarized due to the ferromagnetism of Ni. Therefore, Ni(111) surfaces have been intensively investigated using PES (Himpsel and Eastman, 1978;Donath, Passek, and Dose, 1993;Kutzner et al, 1997;Okuda et al, 2009) and in theory (Braun and Donath, 2002;Magaud et al, 2004;Ohwaki et al, 2006). It was revealed that Ni(111) surfaces indeed have spinpolarized surface states.…”

Section: B Spin-polarized Electron Scattering On Magnetic Substratesmentioning

confidence: 99%

“…Spin-split Shockley surface states dispersing upward in energy were found (Donath, Passek, and Dose, 1993). The spin-split surface states have an exchange splitting of 50-100 meV and a band bottom for the majorityspin electron around the Fermi energy atΓ (Donath, Passek, and Dose, 1993;Okuda et al, 2009). Thus, spin-dependent electron scattering phenomena might be investigated on Ni (111) surfaces.…”

Section: B Spin-polarized Electron Scattering On Magnetic Substratesmentioning

confidence: 99%

Spin-polarized quantum confinement in nanostructures: Scanning tunneling microscopy

et al. 2014

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Experimental investigations of spin-polarized electron confinement in nanostructures by scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) are reviewed. To appreciate the experimental results on the electronic level, the physical basis of STM is elucidated with special emphasis on the correlation between differential conductance, as measured by STS, and the electron density of states, which is accessible in ab initio theory. Experimental procedures which allow one to extract the electron dispersion relation from energy-dependent and spatially resolved STM and STS studies of electron confinement are reviewed. The role of spin polarization in electron confinement is highlighted by both experimental and theoretical insights, which indicate variation of the spin polarization in sign and magnitude on the nanometer scale. This review provides compelling evidence for the necessity to include spatial-dependent spin-resolved electronic properties for an in-depth understanding and quantitative assessment of electron confinement in magnetic nanostructures and interaction between magnetic adatoms.

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“…A Shockley surface state, derived from the sp band, with a majority spin component presides over the electronic structure at the Fermi level, while its minority component is unoccupied. A second surface state with minority spin character, deriving from the d-bands also exists with its counterparts [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Surface states characterization in the strongly interacting graphene/Ni(111) system

Achilli

Tognolini²,

Fava³

et al. 2018

New J. Phys.

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By combining nonlinear photoemission experiments and density functional theory calculations, we study the modification of Ni(111) surface states induced by the presence of graphene. The main result is that graphene is able to displace the Ni(111) surface states from the valence band close to the Fermi level uncovering the d-band of Ni. The shift of the surface states away from the Fermi level modifies their k-dispersion and the effective mass. The unoccupied image state of graphene/Ni(111) has been also characterized. The ab initio calculations give a theoretical insight into the electronic properties of graphene/Ni(111) in the two stable top-fcc and top-bridge phases showing that the interface properties are poorly dependent on the stacking. The screening properties to an externally applied electric field are also discussed.

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Exchange splitting of the threeΓ¯surface states of Ni(111) from three-dimensional spin- and angle-resolved photoemission spectroscopy

Cited by 19 publications

References 23 publications

Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra:An experimental and theoretical study

Effects of spin-dependent quasiparticle renormalization in Fe, Co, and Ni photoemission spectra:An experimental and theoretical study

Spin-polarized quantum confinement in nanostructures: Scanning tunneling microscopy

Surface states characterization in the strongly interacting graphene/Ni(111) system

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