Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Direct evidence of spin-split one-dimensional metallic surface state on
  Si(557)-Au   We report unprecedented evidence of a spin split one-dimensional metallic
surface state for the system of Si(557)-Au obtained by means of high-resolution
spin- and angle-resolved photoelectron spectroscopy combined with first
principles calculations. The surface state shows double parabolic energy
dispersions along the Au chain structure together with a reversal of the spin
polarization with respect to the time-reversal symmetry point as is
characteristic from the Rashba effect. Moreover, we have observed a
considerably large out-of-plane spin polarization which we attribute to the
highly anisotropic wave function of the gold chains.

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The categories of this paper are: supr-con
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph