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BaDElPh Home

Welcome to the Low Energy-ARPES beamline @ Elettra


The Band Dispersion and Electron-Phonon coupling (BaDElPh) beamline provides photons in the energy range 4.6-40 eV with high flux, high resolving power, and horizontal-vertical linear polarization. The beamline serves an end station to perform primarily high-resolution angle-resolved photoemission spectroscopy (ARPES) experiments in the low photon energy regime. Photon energies lower than 15 eV provide enhanced bulk sensitivity, allow for the highest momentum and energy resolution, and are useful in tuning matrix elements which vary rapidly at low energy. The availability of such low photon energies makes BaDElPh unique among the other ARPES beamlines at Elettra and around the world.

Research highlights | Publications

Spin-orbit gap in graphene

By means of ARPES and spin-resolved measurements, we show that intercalation of a Pb monolayer between the graphene sheet and the Pt(111) surface leads to formation of a spin-orbit coupling induced gap of about 200 meV at the Dirac point of graphene.

  Klimovskikh et al., ACS Nano 11, 368 (2017).

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Li-doped metallic black phosphorous

Using ARPES and first-principle calculations, we show that the surface of black phosphorus (bP) can be chemically functionalized using Li atoms and the electron–phonon coupling in this metallic phase is strong enough to eventually lead to a superconducting phase at Tc = 17K for LiP8 stoichiometry.

  Sanna et al., 2D Mater. 3, 025013 (2016).

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Rashba coupling amplification by a staggered crystal field

By means of ARPES and first-principles calculations, we give evidence of a large Rashba coupling leading to a remarkable band splitting in centrosymmetric  BaNiS2. This is explained by a huge staggered crystal field that breaks inversion symmetry at the Ni site.

  Santos-Cottin et al., Nat. Commun. 7, 11258 (2016).

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Electron-phonon coupling and superconductivity in graphene

We have performed an high-resolution ARPES investigation to try to find an electron donor for graphene that is capable of inducing strong electron–phonon coupling and superconductivity. Calcium is the most promising candidate for realizing superconductivity in graphene.


Fedorov et al., Nat. Commun. 5, 3257 (2014);    Haberer et al., Phys. Rev. B 88, 081401(R) (2013).

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Surface-enhanced CDW in underdoped Bi(2201)-cuprates

Using ARPES at low photon energy we have discovered a temperature-dependent evolution of the CuO2 plane band dispersion in underdoped Bi2Sr2-xLaxCuO6+δ (Bi2201). This effect is limited to the surface and point to a surface-enhanced CDW instability.

  Rosen, Comin et al., Nat. Commun. 4, 1977 (2013).

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Origin of electron accumulation in In2O3

We have used ARPES at low photon energy to directly image a quantized two-dimensional electron gas at the surface of In2O3(111). The microscopic origin of these electrons is shown to be oxygen vacancies, acting as doubly ionized shallow donors, localized at the surface.

  Zhang et al., Phys. Rev. Lett. 110, 056803 (2013).

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Main News

Fully motorized manipulator & beamline software upgrade

2018-01-15: The custom-made 5-axis sample manipulator has been fully motorized and can now be also remotely controlled. The beamline control software has been completely upgraded. Users can benefit of both these improvements during the beamtimes.

BaDElPh in CERIC-ERIC  

2014-09-01: The BaDElPh beamline at Elettra has been included in the list of facilities accessible through the CERIC-ERIC call proposal. CERIC-ERIC offers access to several complementary facilities through a single proposal and a single access point. Submit your multifacility proposal by CERIC-ERIC Virtual Unified Office (VUO).


User Area

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 Proposal

The deadline for proposal submission for beamtime allocation from January 1st to June 30th, 2019 will be September 17th, 2018 at 11:59 pm (MET).

Last Updated on Monday, 27 August 2018 10:52