Speaker
Gianmarco Gatti
(EPFL)
Description
We report a comprehensive study of the low-energy bandstructure of the nodal-line semimetals ZrSiX (X = Se,Te), combining angle-resolved photoemission spectroscopy (ARPES) and first-principle calculations. We discriminate between the existence of bulk and surface states, whose spin texture is revealed by the means of spin-resolved ARPES and confirmed by our calculations. Interestingly, a strong spin polarization of the metallic bulk states is predicted in the surface-projected electronic structure of the centrosymmetric ZrSiTe. This result is investigated experimentally and discussed in terms of the ‘local’ inversion asymmetry of the crystal, which enhances the spin-orbit interaction in the layered crystalline structure of this compound.
Authors
Gianmarco Gatti
(EPFL)
Dr
Alberto Crepaldi
(EPFL)
Dr
Gabriel Autès
Prof.
Marco Grioni
(EPFL)
Dr
Silvan Roth
(Institute of Physics, Ecole Polytechnique F\'ed\'erale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland)
Oleg Yazyev
(EPFL - EPF Lausanne)
