SPring-8, the large synchrotron radiation facility

Date: 16:00-17:00 March 12, 2009

Place: Kamitsubo Hall

Speaker: Dr. Andrei Varykhalov

Affiliate:
Helmholtz-Zentrum für Materialien und Energie, Elektronenspeicherring BESSY II

Title:
Status of angle- and spin-resolved photoemission at BESSY-II and recent experiments with quantum films spin-polarized due to spin-orbit interactions at buried interfaces

Abstract:
The scope of the seminar will include a brief report on recent developments in the field of photoelectron spectroscopy with ultra-high energy, angle- and spin-resolution at the synchrotron radiation facility BESSY-II in Berlin. Several examples of experimental activities, concerned with investigations of various quantum films spin-polarized due to spin orbit-interactions at the interfaces will be presented. [1-2] In particular, the first observation of a Rashba effect in metal quantum well states will be presented. Another reported experiment deals with the electronic structure and spin-polarization in graphene synthesized on transition metal surfaces and electronically decoupled from these surfaces by intercalation of a Au monolayer. [3] We also discuss the existence of Rashba effect in graphene on bare 3d ferromagnetic substrates [4], as reported recently in the literature.

 [1] A. Varykhalov et al., Phys. Rev. Lett. 101, 256601 (2008).
 [2] A. M. Shikin et al., Phys. Rev. Lett. 100, 057601 (2008).
 [3] A. Varykhalov et al., Phys. Rev. Lett. 101, 157601 (2008).
 [4] O. Rader et al., Phys. Rev. Lett. 102, 057602 (2009).

Organizer:
JAEA Shin-ichi Fujimori
PHS: 3914