The APE concept is based on a state-of-the-art surface science laboratory as a support facility for advanced spectroscopies at two distinct beamlines using polarized synchrotron radiation in the ultraviolet and soft X-ray range from the Elettra storage ring. APE is a facility for spectroscopic investigation of solid surfaces and nanostructured matter for which the sample preparation and survey represent crucial and integral part of the experiment. For this reason a number of spectroscopic techniques (ARPES (with new VG Scienta DA30 analyzer and in spin-resolved mode), XAS, XMCD/LD, XPS, Mott magnetometry) is coupled with sophisticated off-line preparation/growth and characterization tools (atomically resolved STM, LEED-Auger, magneto-optical Kerr effect). |
Research highlights / APE-LE Publications / APE-HE Publications / APE Publications![]() Ferroelectric Control of the Spin Texture in GeTe
We provide the experimental demonstration of the correlation between ferroelectricity and spin texture in GeTe, the parent compound of ferroelectric Rashba semiconductors. ![]() Ubiquitous formation of bulk Dirac cones and topological surface states from a single orbital manifold in transition-metal dichalcogenides
![]() Maximal Rashba-like spin splitting via kinetic-energy-coupled inversion-symmetry breaking
![]() Signature of type-II Weyl semimetal phase in MoTe2
![]() Evidence for a Strong Topological Insulator Phase in ZrTe5
The complex electronic properties of ZrTe5 have recently stimulated in-depth investigations that assigned this material to either a topological insulator or a 3D Dirac semimetal phase. Here we report a comprehensive experimental and theoretical study of both electronic and structural properties of ZrTe5, revealing that the bulk material is a strong topological insulator. ![]() Manipulating the Topological Interface by Molecular Adsorbates: Adsorption of Co-Phthalocyanine on Bi2Se3
Topological insulators are a promising class of materials for applications in the field of spintronics. New perspectives in this field can arise from interfacing metal–organic molecules with the topological insulator spin-momentum locked surface states, which can be perturbed enhancing or suppressing spintronics-relevant properties such as spin coherence. ![]() Layer Dependent Quantum Cooperation of Electron and Hole States in the Anomalous Semimetal WTe2
We report angle- and spin-resolved photoemission spectroscopy of WTe2 single crystals, through which we disentangle the role of W and Te atoms in the formation of the band structure and identify the interplay of charge, spin and orbital degrees of freedom. ![]() Multiple Coexisting Dirac Surface States in Three-Dimensional Topological Insulator PbBi6Te10
By means of angle-resolved photoemission spectroscopy (ARPES) measurements, we unveil the electronic band structure of three-dimensional PbBi6Te10 topological insulator. ![]() New strategy for the growth of complex heterostructures based on different 2D materials
Tungsten disulfide (WS2) monolayers have been synthesized under ultra high vacuum (UHV) conditions on quasi-free-standing hexagonal boron nitride (h-BN) and gold deposited on Ni(111). We find that the synthesis temperature control can be used to tune the WS2 structure. ![]() Giant Rashba-Type Spin Splitting in Ferroelectric GeTe(111)
The Rashba effect as an electrically tunable spin-splitting is anticipated to be the key for semiconductor-based spintronics. It has been pursued in semiconductor heterostructures, where advanced experiments found tunable spin signals at low temperature.
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From 2013 APE became an integral part of the NFFA-Trieste that allowed for the integration of an extra suite of growth and analysis chambers with the APE beamlines. The integral setup will become an open access facility for sample growth, sample characterization and advanced on-line spectroscopic characterization, including spin-resolved ARPES (see VESPA in Journal of Synchrotron Radiationa) that was also implemented within NFFA.
VESPA: Very Efficient Spin Polarization Analysis
Please refer to our article published in Journal of Synchrotron Radiation.
Proposal SubmissionWe 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 assesment of the experiment feasibility and may lead to improvements in the proposed experimental plan. |
Call for proposalsThe deadline for proposal submission for beamtime allocation from July 1st to December 31st, 2020 has been postponed from March 16th to April 6th, 2020. |