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Direct observation of the spin polarization in Au atomic wires on Si(553)

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Title
Direct observation of the spin polarization in Au atomic wires on Si(553)
Author(s)
H W Yeom; Sung Won Jung; Jin Sung Shin; J Kim; K S Kim; Miyamoto K.; Okuda T.; Namatame H.; Kimura A.; Taniguchi M.
Publication Date
2014-09
Journal
NEW JOURNAL OF PHYSICS, v.16, no., pp.093030 -
Publisher
IOP PUBLISHING LTD
Abstract
The spin-resolved electronic band structure of Au-induced metallic atomic wires on a vicinal silicon surface, Si(553), was investigated using spin- and angleresolved photoelectron spectroscopy. We directly measured the spin polarization of three partially filled one-dimensional metallic bands, a one-third-filled band, and the doublet of nearly half-filled bands. For the half-filled doublet, the strong apparent spin polarization was observed near the Fermi energy with a minor outof- plane spin component. This observation is consistent with the Rashba-type spin-orbit splitting and with a recent experiment on a similar doublet of Si(557)- Au. In contrast, the one-third-filled band does not show a substantial spin polarization within the experimental accuracy, indicating a much smaller spin splitting, if any. These results are discussed for the origin of the partially filled bands and for the intriguing broken-symmetry ground state observed at low temperature.
URI
http://pr.ibs.re.kr/handle/8788114/1471
DOI
10.1088/1367-2630/16/9/093030
ISSN
1367-2630
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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