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Updated: May 23, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Tunable spin polarization in bismuth ultrathin film on Si(111)
Akari Takayama1, Takafumi Sato, Seigo Souma
1Department of Physics, Tohoku University, Sendai 980-8578, Japan. a.takayama@arpes.phys.tohoku.ac.jp
Abstract:
We performed a spin- and angle-resolved photoemission spectroscopy of bismuth ultrathin film on Si(111) with various film thickness d. We found that the spin polarization of spin-split Rashba surface states near the Brillouin-zone boundary, which is high (0.7) at d = 40 BL (bilayers), is gradually reduced on decreasing d and almost vanishes at d = 8 BL. This finding provides a novel method to generate spin-polarized electrons with tunable spin-polarization.
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