Towards an African Light Source

Connell, S. H.; Mtingwa, S.; Dobbins, Tabbetha; Khumbah, Nkem; Masara, Brian; Mitchell, Edward P.; Norris, L. F.; Ngabonziza, Prosper; Ntsoane, T.P.; Winick, H.

doi:10.1007/s12551-019-00578-3

Cited by 12 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, these ARPES data show two flat bands, α 2 and δ , that exhibit a complex DOS closer to the Fermi-level, suggesting that these two bands are the most likely bands that will give rise to vHS in the near Fermi-level DOS, a situation which is favorable for magnetic instabilities in Sr 4 Ru 3 O 10 material. We like to finish by also pointing out that this work is inline with current efforts to have in the near future the first African synchrotron light-source built on the African continent [69][70][71] , which is expected to boost research output for African scientists and their international colleagues conducting experimental research related to or enabled by synchrotron light-sources.…”

Section: Resultsmentioning

confidence: 88%

Fermi surface and kink structures in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ revealed by synchrotron-based ARPES

Ngabonziza

Carleschi

Zabolotnyy

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

The low-energy electronic structure, including the Fermi surface topology, of the itinerant metamagnet $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ Sr 4 Ru 3 O 10 is investigated for the first time by synchrotron-based angle-resolved photoemission. Well-defined quasiparticle band dispersions with matrix element dependencies on photon energy or photon polarization are presented. Four bands crossing the Fermi-level, giving rise to four Fermi surface sheets are resolved; and their complete topography, effective mass as well as their electron and hole character are determined. These data reveal the presence of kink structures in the near-Fermi-level band dispersion, with energies ranging from 30 to 69 meV. Together with previously reported Raman spectroscopy and lattice dynamic calculation studies, the data suggest that these kinks originate from strong electron–phonon coupling present in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ Sr 4 Ru 3 O 10 . Considering that the kink structures of $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ Sr 4 Ru 3 O 10 are similar to those of the other three members of the Ruddlesden Popper structured ruthenates, the possible universality of strong coupling of electrons to oxygen-related phonons in $$\hbox {Sr}_{n+1}\hbox {Ru}_{{n}}\hbox {O}_{3n+1}$$ Sr n + 1 Ru n O 3 n + 1 compounds is proposed.

show abstract

Section: Resultsmentioning

confidence: 88%

Fermi surface and kink structures in $$\hbox {Sr}_{{4}}\hbox {Ru}_{{3}}\hbox {O}_{{10}}$$ revealed by synchrotron-based ARPES

Ngabonziza

Carleschi

Zabolotnyy

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…In practice, the AfLS governance structure consists of an International Advisory Committee and an Executive Committee that collectively fulfil the AfLS mission as outlined in the AfLS Roadmap 8 . There are several implementation committees for specific areas of the Roadmap.…”

Section: Inclusive Approach For An African Light Sourcementioning

confidence: 99%

Building a brighter future for Africa with the African Light Source

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The lone Special Issue Editor, Prof. Trevor Sewell, performed a remarkable job, both in organizing the Meeting and in assembling the nineteen contributions to the Issue (Sewell 2019;Hall 2019a). One of the standout features of this Issue was the well-argued Letter contributed by Connell and coworkers making the case for investment in an African Synchrotron (Connell et al 2019). As described within that Letter, such a proposal could potentially produce positive developments in ways not just relating to scientific research, by helping to build infrastructure capable of supporting industrial and societal improvements for all within the continent.…”

Section: -A Year In Reviewmentioning

confidence: 99%