The direct measurement of spectral momentum densities of silicon with high energy spectroscopy

Bowles, Cameron A; Kheifets, Anatoli; Sashin, Vladimir; Vos, Maarten; Weigold, E.

doi:10.1016/j.elspec.2004.05.006

Cited by 5 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated anisotropy of the dispersion was small and could not be confirmed by the experiment. This is in contrast to single-crystal films of silicon [3,4] and copper [5], where the experimental single-crystal results clearly resolve the anisotropy of the electronic structure. These measurements of a metallic phase of vanadium oxide open the way for studying an insulating phase, which cannot be described by band structure theory.…”

Section: Discussioncontrasting

confidence: 79%

“…In the last few years, the technique has been tested for several 'simple' cases, where the samples are considered to be well understood materials. For example, single crystals of graphite [2], silicon [3,4] and copper [5] were studied. In general, it became clear that, in spite of multiple scattering, quantitative information can be obtained by EMS, and even for the simple cases reasonable agreement between measurement and theory can be obtained only if many-body effects are incorporated in the theory.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spectral momentum densities of vanadium and vanadium oxide as measured by high energy (e, 2e) spectroscopy

Chen¹,

Gale²,

Kheifets³

et al. 2005

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The spectral momentum densities of vanadium metal and V2O3 are measured by electron momentum spectroscopy. Results are compared with band structure calculations based on density functional theory (DFT). Qualitatively, the agreement between theory and experiment is good. The calculated total band width of vanadium metal (6.5 eV) is in excellent agreement with the observed one (6.5 ± 0.25 eV). The splitting between the outer and inner valence bands in V2O3 is 2 eV larger in the experiment than in the density functional theory calculation. The observed momentum distributions agree reasonably well with the calculated distributions with the exception of the intensity of the outer valence band relative to the inner valence band in V2O3: the outer valence band is less intense than calculated. The momentum density near the Fermi level in V metal resembles that of atomic V 3d orbitals. However, momentum profiles of the V 3d orbitals in V2O3 are much more sharply peaked than the atomic 3d orbital in both the theory and experiment. Correlation effects are discussed and theoretical problems in describing EMS data from narrow band systems are identified.

show abstract

Section: Discussioncontrasting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Spectral momentum densities of vanadium and vanadium oxide as measured by high energy (e, 2e) spectroscopy

Chen¹,

Gale²,

Kheifets³

et al. 2005

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Contributions to the measured intensity that may come from all Brillouin zones 11 are due to g ជ-assisted events, their relevance being related to the ͑de-͒localization of the ionizing collision, that is, to the IA validity. Furthermore, it is an easy matter to see from Eq.…”

Section: Introductionmentioning

confidence: 99%

Two-step-wise interpretation of highly asymmetric, grazing angle (e,2e) on solids: A real momentum spectroscopy for surfaces and overlayers

et al. 2008

View full text Add to dashboard Cite

This paper deals with the mechanism of grazing incidence (e,2e) events from surfaces. Two different approaches are considered. In both cases, elastic scattering with the crystal lattice assists the inelastic collision; these two steps are coupled either coherently or incoherently. Experimental evidence is given that the "coherent" approach reproduces better the cross section dependence on momentum transfer in the specific case of asymmetric kinematics at moderate electron energies. This model has allowed us to map out the band dispersion of the outermost valence states of highly oriented pyrolytic graphite and to measure the momentum distribution of pi-electron states without invoking the contribution of reciprocal lattice vectors in the momentum conservation. Agreement between theory and experiment is satisfactory, though the presence of events where crystal momentum is reconstructed cannot be ruled out. These results, obtained with a significant reduction of the experiment duration by an implemented apparatus, show that reflection (e,2e) can be used to build up a momentum spectroscopy with high surface sensitivity

show abstract

New Experimental Technique for Studying Electron-Electron Interaction, Electron Correlation, Mechanism of Electron Emission and Electronic Properties of Surfaces

Samarin

Artamonov

Williams

2018

Spin-Polarized Two-Electron Spectroscopy of Surfaces

View full text Add to dashboard Cite

The direct measurement of spectral momentum densities of silicon with high energy spectroscopy

Cited by 5 publications

References 28 publications

Spectral momentum densities of vanadium and vanadium oxide as measured by high energy (e, 2e) spectroscopy

Spectral momentum densities of vanadium and vanadium oxide as measured by high energy (e, 2e) spectroscopy

Two-step-wise interpretation of highly asymmetric, grazing angle (e,2e) on solids: A real momentum spectroscopy for surfaces and overlayers

New Experimental Technique for Studying Electron-Electron Interaction, Electron Correlation, Mechanism of Electron Emission and Electronic Properties of Surfaces

Contact Info

Product

Resources

About