Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin- and angle-resolved inverse photoemission setup with spin
  orientation independent from electron incidence angle   A new spin- and angle-resolved inverse photoemission setup with a low-energy
(5-100 eV) electron source is presented. The spin-polarized electron source,
with a compact design, can decouple the spin polarization vector from the
electron beam propagation vector, allowing to explore any spin orientation at
any wavevector in angle-resolved inverse photoemission. The beam polarization
can be tuned to any preferred direction with a shielded electron-optical
system, preserving the parallel beam condition. We demonstrate the performances
of the setup by measurements on Cu(001), Au(111) and ultrathin Co films. We
estimate at room temperature the energy resolution of the overall system to be
$\sim170$ meV from $kT_{eff}$ of a Cu(001) Fermi level, allowing a direct
comparison to photoemission. The spin-resolved operation of the setup has been
demonstrated by measuring the Rashba splitting of the Au(111) Shockley surface
state. The effective polarization of the electron beam is $P=30\pm3$ \% and the
wavevector resolution is $\Delta k_{F}\lesssim0.06$ \AA$^{-1}$. Measurements on
ultrathin Co films with out-of-plane magnetization and on Au(111) surface state
demonstrate how the electron beam polarization direction can be tuned in the
three spatial dimensions. In both systems the maximum of the spin asymmetry is
reached when the electron beam polarization is aligned with the out-of-plane
magnetization of the Co film or the in-plane spin-polarization of Au(111)
surface state.

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The categories of this paper are: supr-con
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org