Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: C1.00272 : Performance of the spin- and angle- resolved photoemission spectrometer with highly efficient VLEED spin detector
Author:
Because of the growing scientific interests in the spin-related exotic
materials such as topological insulators, spin- and angle- resolved
photoemission with much improved efficiency is strongly desired. In this
report, we present the current status of a new SARPES with significantly
improved energy- ($\Delta E)$ and angular resolutions ($\Delta \theta )$,
which is under construction at beam line BL-9B in Hiroshima Synchrotron
Radiation Center. The system consists of high performance hemispherical
analyzer (VG-Scienta R-4000) and highly efficient spin detector based on
very low energy electron diffraction of Fe(001)p(1x1)-O, which has 100 times
higher efficiency than conventional Mott spin detector. Owing to the high
efficiency of the detector, the highest $\Delta E$ and $\Delta \theta $
have been improved to be 7.5 meV and 0.37$^{o}$. Moreover, high-resolution
ARPES measurement ($\Delta E \quad \sim $ 2meV, $\Delta \theta \quad \sim $
0.2$^{o})$ and Fermi surface mapping in the sample temperature range from 8K
to room temperature can be efficiently performed by hemispherical analyzer
equipped with multi-channel detector and motorized 5 axis goniometer. These
features of the SARPES enable us to observe detailed spin-dependent band
structures of topological insulators very precisely and efficiently.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.C1.272
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