Investigation of the near-surface electronic structure of Cr(001)

Klebanoff, L. E.; Robey, S. W.; Liu, G; Shirley, D. A.

doi:10.1103/physrevb.31.6379

Cited by 53 publications

(11 citation statements)

References 71 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This Cr atomic magnetism persists, even though direct valence-band measurements of Cr reveal the loss of magnetic order on the length scale of 6 Å. 26 We note here that a temperature-independent 3s photoemission peak has been observed previously for Mn 3s in MnO ͑Ref. 27͒ and for Fe 3s in metallic Fe ͑Ref.…”

Section: Resultssupporting

confidence: 70%

See 1 more Smart Citation

Temperature-dependent study of3smultiplet splitting in ferromagnetic Ni

Glueckstein

Klebanoff

2003

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

A high-resolution x-ray photoelectron spectroscopy ͑HRXPS͒ study of the Ni 3s core level is presented. Ni 3s HRXPS spectra were compared at Tϭ298 K (Tϭ0.47T c ) and 863 K (Tϭ1.37T c ). No significant variation with temperature is observed. These HRXPS results, combined with prior spin-resolved x-ray photoelectron spectroscopy studies of Ni core levels, indicate the persistence of atomic magnetism in the paramagnetic phase of Ni on the length scale of ϳ0.75 Å. The data suggest that temperature-induced changes in the Ni 3d spin polarization occur at the periphery of the metallic atom, i.e., outside a radius of 0.75 Å, leaving the spin density within 0.75 Å unaffected.

show abstract

Section: Resultssupporting

confidence: 70%

“…25,26 In those prior studies, a temperature-independent Cr 3s multiplet splitting was observed 25 up to 715 K above the bulk Néel temperature. This Cr atomic magnetism persists, even though direct valence-band measurements of Cr reveal the loss of magnetic order on the length scale of 6 Å.…”

Section: Resultsmentioning

confidence: 83%

Temperature-dependent study of3smultiplet splitting in ferromagnetic Ni

Glueckstein

Klebanoff

2003

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…Similar to the conventional Kondo effect, where a local magnetic moment is screened by a spinflip mechanism, which leads to a resonance in the density of states very close to the Fermi level, the orbital Kondo resonance is produced by the flip of the orbital moment of the d xz,yz surface states. In fact, in addition to the above mentioned occupied surface state observed by Klebanoff et al, [1][2][3] an unoccupied surface state at an energy of 1.7 eV above E F had been identified by inverse photoemission ͑IPE͒ before. 8 The interpretation in terms of an orbital Kondo resonance was recently scrutinized by a temperature-dependent STS study.…”

mentioning

confidence: 84%

“…One focus of interest was a surface-sensitive feature that appears close to the Fermi level E F , first observed in a combined experimental and theoretical work by Klebanoff et al [1][2][3] Using polarized light in their photoemission ͑PE͒ setup, they identified a d z 2-like surface state at E F . Comparing their data with the theoretical part of the work which predicted a d z 2-like surface state 0.68 eV above E F , they concluded that the observed feature was mainly unoccupied and their photoemission results showed this surface state truncated by the Fermi edge.…”

mentioning

confidence: 99%

Surface state vs orbital Kondo resonance at Cr(001): Arguments for a surface state interpretation

et al. 2008

View full text Add to dashboard Cite

We have performed a combined scanning tunneling spectroscopy, photoemission, and inverse photoemission study of the surface electronic structure of Cr͑001͒. Our results show three surface-related features, one below, one above, and one right at the Fermi level E F . While the surface-sensitive features below and above the Fermi level show characteristics of d xz,yz orbital symmetry, the feature right at E F exhibits predominantly d z 2-like orbital symmetry. Upon exposure to oxygen, its spectral weight continuously shifts into the unoccupied electronic states. These results are in conflict with the interpretation of this peak as orbital Kondo resonance but point toward a Shockley-type surface state.

show abstract

“…The question if correlations actually are important for the electronic structure has been subject of measurements using (inverse) photo emission spectroscopy (PES) ( [76,77,82,83]) and scanning tunneling spectroscopy (STS) [84]. These measurements all reveal a sharp peak close the Fermi energy.…”

Section: Electronic Structure Of the Cr(001) Surfacementioning

confidence: 99%

Realistic theory of electronic correlations in nanoscopic systems

Schüler

Barthel

Wehling

et al. 2017

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

Abstract.Nanostructures with open shell transition metal or molecular constituents host often strong electronic correlations and are highly sensitive to atomistic material details. This tutorial review discusses method developments and applications of theoretical approaches for the realistic description of the electronic and magnetic properties of nanostructures with correlated electrons. First, the implementation of a flexible interface between density functional theory and a variant of dynamical mean field theory (DMFT) highly suitable for the simulation of complex correlated structures is explained and illustrated. On the DMFT side, this interface is largely based on recent developments of quantum Monte Carlo and exact diagonalization techniques allowing for efficient descriptions of general four fermion Coulomb interactions, reduced symmetries and spin-orbit coupling, which are explained here. With the examples of the Cr (001) surfaces, magnetic adatoms, and molecular systems it is shown how the interplay of Hubbard U and Hund's J determines charge and spin fluctuations and how these interactions drive different sorts of correlation effects in nanosystems. Non-local interactions and correlations present a particular challenge for the theory of low dimensional systems. We present our method developments addressing these two challenges, i.e., advancements of the dynamical vertex approximation and a combination of the constrained random phase approximation with continuum medium theories. We demonstrate how non-local interaction and correlation phenomena are controlled not only by dimensionality but also by coupling to the environment which is typically important for determining the physics of nanosystems.a

show abstract

Investigation of the near-surface electronic structure of Cr(001)

Cited by 53 publications

References 71 publications

Temperature-dependent study of3smultiplet splitting in ferromagnetic Ni

Temperature-dependent study of3smultiplet splitting in ferromagnetic Ni

Surface state vs orbital Kondo resonance at Cr(001): Arguments for a surface state interpretation

Realistic theory of electronic correlations in nanoscopic systems

Contact Info

Product

Resources

About