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BaDElPh@VUV, a temporary joint project of ISM-CNR and Elettra - Sincrotrone Trieste, provides the state-of-the-art instrumentation of the new BaDElPh end station connected to the VUV-Photoemission beamline for the next period. Since 2025, it has been operating through the joint efforts of the research groups of the former BaDElPh and VUV-Photoemission beamlines.
The horizontal linear polarized synchrotron radiation in the energy range 20(25)-750 eV is primarily used to perform photoemission investigations of solid surfaces and nanostructured materials. In particular, angle-resolved photoemission spectroscopy (ARPES with the MBS A-1 analyzer) with also spin-resolved mode (by MBS spin manipulator and FOCUS FERRUM spin detector, under commissioning), UPS, XPS and PED.
BaDElPh@VUV operates in time sharing with the Spectromicroscopy beamline, with 50% of time.
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Spin-Dependent ππ* Gap in Graphene on a Magnetic Substrate

  
  One of the main challenges in the exploitation of spin injection and transport in graphene is represented by its too-strong electronic interaction with the magnetic contacts. We show by ARPES, spin-ARPES and DFT calculations, that the intercalation of an Eu monolayer between graphene and Ni restores an almost linear dispersion of the π states.

P. M. Sheverdyaeva et al., Phys. Rev. Lett. 132, 266401 (2024)

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Synthesis of mesoscale ordered two-dimensional π-conjugated polymers with semiconducting properties

Two-dimensional materials with high charge carrier mobility and tunable band gaps have attracted intense research effort for their potential use in nanoelectronics. Two-dimensional π-conjugated polymers constitute a promising subclass because the band structure can be manipulated by varying the molecular building blocks while preserving key features such as Dirac cones and high charge mobility. 
G. Galeotti et al., Nat. Mater. 19, 874 (2020)

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Indirect chiral magnetic exchange through Dzyaloshinskii–Moriya-enhanced RKKY interactions in manganese oxide chains on Ir(100)

Localized electron spins can couple magnetically via the Ruderman–Kittel–Kasuya–Yosida interaction even if their wave functions lack direct overlap. Theory predicts that spin–orbit scattering leads to a Dzyaloshinskii–Moriya type enhancement of this indirect exchange interaction, giving rise to chiral exchange terms. 
M. Schmitt et al., Nat. Comm. 10, 2610 (2019)

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Electronic structure of the Ge/Si(1 0 5) hetero-interface: an ARPES and DFT study


  We present a joint experimental and theoretical study of the electronic properties of the rebonded-step reconstructed Ge/Si(1 0 5) surface which is the main strained face found on Ge/Si(0 0 1) quantum dots and is considered a prototypical model system for surface strain relaxation in heteroepitaxial growth. 

P. M. Sheverdyaeva et al., J. Phys.: Condens. Matter 30, 465502 (2018)

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Electronic States of Silicene Allotropes on Ag(111)

  
  Silicene, a honeycomb lattice of silicon, presents a particular case of allotropism on Ag(111). Silicene forms multiple structures with alike in-plane geometry but different out-of-plane atomic buckling and registry to the substrate. Angle-resolved photoemission and first-principles calculations show that these silicene structures, with (4×4), (√13×√13)R13.9°, and (2√3×2√3)R30° lattice periodicity, display similar electronic bands despite the structural differences. 

P. M. Sheverdyaeva et al., ACS Nano 11, 975 (2017)

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Asymmetric band gaps in a Rashba film system

  
  The joint effect of exchange and Rashba spin-orbit interactions is examined on the surface and quantum well states of Ag2Bi-terminated Ag films grown on ferromagnetic Fe(110). The system displays a particular combination of time-reversal and translational symmetry breaking that strongly influences its electronic structure. Angle-resolved photoemission reveals asymmetric band-gap openings, due to spin-selective hybridization between Rashba-split surface states and exchange-split quantum well states. 

C. Carbone et al., Phys. Rev. B 93, 125409 (2016)

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Silicene on Ag(111): A honeycomb lattice without Dirac bands


 The discovery of (4×4) silicene formation on Ag(111) raised the question whether silicene maintains its Dirac fermion character, similar to graphene, on a supporting substrate. Previous photoemission studies indicated that the π band forms Dirac cones near the Fermi energy, while theoretical investigations found it shifted at deeper binding energy.  

S. Mahatha et al., Phys. Rev. B 89, 201416(R) (2014)

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Top News

2025.01.15: The first beam has been delivered to the BaDElPh end station from the VUV beamline. The commissioning of BaDElPh@VUV will continue in the coming weeks.

 2024.11.28: BaDElPh has been moved to the final position in Elettra 2.0, and its end station is temporarily connected to the VUV-Photoemission beamline.

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Proposal Submission

We invite users and collabrators to discuss their proposals with the beamline local contacts well in advance before the submission deadline. This is crucial for a careful assessment of the experiment feasibility and may lead to improvements in the proposed experimental plan. Our website provides a wealth of information on experiment feasibilty and proposal submission. For more info, please visit the user info section.

Call for proposals

The deadline for proposal submission for beamtime allocation is to be announced

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Ultima modifica il Lunedì, 20 Gennaio 2025 10:56