Structural instability at the In-terminated surface of the heavy-fermion superconductor CeIrIn5

Driven by reconstruction and relaxation, by the appearance of surface electron states and resonances, the surface properties and related temperature scales of strongly correlated f-materials may differ dramatically from those in the bulk. Applying low energy electron and photoelectron diffraction techniques, momentum-resolved photoelectron spectroscopy and ab initio calculations, we demonstrate that the In-terminated surface of the heavyfermion superconductor CeIrIn5 experiences a reconstruction with a (root 2v x root 2)R45 degrees ordered structure. The latter appears due to the displacement of In atoms with respect to the Ir sublattice. We show that the electronic structure and related properties of the reconstructed In surface differ remarkably from the unreconstructed case. Namely, the predicted surface states with Rashba-type spin splitting do not appear. Our results suggest surface instabilities in similar quasi-two-dimensional strongly correlated f-materials, for which surface reconstructions can be unveiled by means of diffraction techniques.

Mende, MaxTechnische Universität Dresden (författare)
Ali, Khadiza,1989Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)khadizaa (författare)
Poelchen, GeorgTechnische Universität Dresden,European Synchrotron Radiation Facility (ESRF) (författare)
Schulz, SusanneTechnische Universität Dresden (författare)
Vilkov, oleg Yu.Saint Petersburg State University - Spsu (författare)
Bokai, Kirill A.Saint Petersburg State University - Spsu (författare)
Muntwiler, MatthiasPaul Scherrer Institut (författare)
Mandic, VladislavJohann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (författare)
Laubschat, ClemensTechnische Universität Dresden (författare)
Kliemt, KristinJohann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (författare)
Krellner, CorneliusJohann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (författare)
Vyalikh, Denis V.Donostia International Physics Center,Basque Foundation for Science (Ikerbasque) (författare)
Usachov, Dmitry Yu.Saint Petersburg State University - Spsu (författare)
Saint Petersburg State University - SpsuTechnische Universität Dresden (creator_code:org_t)

Av författaren/redakt...: Tarasov, Artem V ...; Mende, Max; Ali, Khadiza, 19 ...; Poelchen, Georg; Schulz, Susanne; Vilkov, oleg Yu.; visa fler...; Bokai, Kirill A.; Muntwiler, Matth ...; Mandic, Vladisla ...; Laubschat, Cleme ...; Kliemt, Kristin; Krellner, Cornel ...; Vyalikh, Denis V ...; Usachov, Dmitry ...; visa färre...

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