Calculation of photoemission spectra for 1TTiSe2 and 1TTiS2

Pehlke, E.; Samuelsen, D.; Schattke, W.

doi:10.1016/0042-207x(90)90412-r

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…We changed hν in 0.25 eV steps below ≈25 eV, which covered the accurate bandmapping ranges, and in 0.5 eV steps above. Our experimental results agree with the previous study carried out in a narrower hν-range (Anderson et al 1985, Pehlke et al 1990a.…”

Section: Pe Experiments and The Data Processingsupporting

confidence: 92%

“…Although not ideal, our results are radically more relevant; this is by virtue of accurate UBs. We conclude, in contrast to Pehlke et al (1990a), that association of the peaks with interband transitions is relevant, although, as we discuss below, at larger hν the shifts may be notable.…”

Section: Data Interpretationcontrasting

confidence: 50%

“…It should be noted that dispersion of the experimental peaks has been very closely reproduced by the calculated structure plots. For TiS 2 , we were able to compare our results with the dispersion from previous calculations (Pehlke et al 1990a) step theory with standard LEED Bloch-wave calculations for the UBs. Although not ideal, our results are radically more relevant; this is by virtue of accurate UBs.…”

Section: Data Interpretationmentioning

confidence: 79%

“…The UBs are not resolved here, because these lower bands are narrower, and give larger hole-lifetime broadening. (Pehlke et al (1990a) assigned the double peak D -D at hν = 21.2 eV to two different UBs. Figure 4(b) shows that D is in fact due to SEE.…”

Section: Multiple-band Final State Compositionmentioning

confidence: 99%

“…The electronic band structures E(k) of TMDCs have been extensively studied by photoemission (PE) (Anderson et al 1985, Pehlke et al 1990a, b, Starnberg et al 1993, 1994, Claessen et al 1996 and inverse photoemission (Straub et al 1985, Law et al 1991, Langlais et al 1995. It was found that, although the dispersion E(k ) parallel to the layers is in general stronger than the dispersion E(k ⊥ ) perpendicular to the layers, E(k ⊥ ) remains significant.…”

Section: Introductionmentioning

confidence: 99%

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Absolute determination of the layer-perpendicular band structure of and by combined very-low-energy electron diffraction and photoemission

Strocov

Starnberg

Nilsson

et al. 1998

J. Phys.: Condens. Matter

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The layer-perpendicular dispersions E(k ⊥ ) of the typical layered TMDCs VSe 2 and TiS 2 were studied by combining determination of the upper unoccupied bands by verylow-energy electron diffraction (VLEED) with mapping of the lower occupied bands by photoemission (PE). We found that the upper bands of these materials are very complicated, and are compatible neither with the free-electron, nor with the ground-state approximation. Knowledge of the upper bands allowed us to carry out a PE experiment optimized for the k ⊥resolved mapping of the lower bands. The PE data were consistently rationalized, using a map of the PE intensity as a function of the binding energy E i and the photon energy hν. We found that the PE intensity is well described by direct, k ⊥ -conserving, transitions, with minor shifts of PE peaks being basically a consequence of their broadening due to finite electron and hole lifetime. Finally the lower bands were mapped explicitly, using the PE peaks with minimal shifts and the experimental upper bands. The obtained E(k ⊥ ) is very consistent, and shows overall agreement with full-potential LAPW calculations.

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Section: Pe Experiments and The Data Processingsupporting

confidence: 92%

Section: Data Interpretationcontrasting

confidence: 50%

Section: Data Interpretationmentioning

confidence: 79%

Section: Multiple-band Final State Compositionmentioning

confidence: 99%