Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 8: Electronic Structure and Spin-Orbit Interaction I
O 8.5: Vortrag
Montag, 31. März 2014, 11:30–11:45, GER 38
Bulk and surface Rashba states in ferroelectric GeTe: combined experimental and theoretical SX-ARPES study — H. Volfova1, J. Krempasky2, H. Dill2, V. Strocov2, J. Braun1, H. Ebert1, K. Hricovini6, R. Calarco3, R. Bertacco4, S. Picozzi5, and •Jan Minar1 — 1LMU Munich, Munich, Germany — 2PSI, Villigen, Switzerland — 3PDI Berlin, Germany — 4Politecnico Milano, Italy — 5CNR-SPIN L'Aquila, Italy — 6Universite de Cergy-Pontoise, France
The recent theoretical investigations of Picozzi et al. [1] predicted a huge Rashba effect originating from bulk states in ferroelectric GeTe, which spin polarisation can be switched by reversing its ferroelectric polarisation. However, detailed experimental and theoretical studies of the electronic structure by means of the angle resolved photoemission (ARPES) are until now missing. Here we present a combined theoretical and experimental study of the electronic structure of GeTe investigated with the aid of the bulk sensitive soft X-ray (SX)-ARPES [2]. It will be shown that a proper description of the photoemission process is necessary to understand the experimental results. These effects are included in the one-step model of photoemission implemented in the SPR-KKR package [3], which presents clear evidence for the predicted bulk Rashba state. [1] Di Sante et al., Andvanced materials 25, 509 (2013) [2] A. Gray, J. Minar et al., Nat. mat. 10, 759 (2011) [3] H. Ebert et al., Rep. Prog. Phys. 74, 096501 (2011)