Light-inducedspin-polarizeddesorptionofRbatomsfromCosurfaces

Abstract

The spin polarization of Rb atoms undergoing light-induced desorption from a spin-polarized Co (110) surface was investigated. Desorption induced by pulsed UV-light irradiation was driven by a non-thermal mechanism and the spins of the desorbed Rb atoms were polarized. This implies spin transfer between the surface and the adsorbate during desorption.

Figures (4)

• Figure 1: (a) Top view of the apparatus and (b) side view of the main chamber viewed from the direction shown by the red arrow in (a).
• Figure 2: Time dependence of photodetector output voltage showing the absorption of probe light by desorbed atoms after UV irradiation.
• Figure 3: The time evolution of (a) the desorption intensity $I_{\rm des}$, (b) the mean velocity component along the surface-normal direction, (c) $I_{\rm des,\sigma +}/I_{\rm des,\sigma -}$, and (d) the averaged magnetic quantum number. The time origin corresponds to the start of UV and Rb beam irradiation.
• Figure 4: The calculated DOS of the surface Co atoms and the adsorbed Rb atom. The inset shows the adsorption site of Rb used for the calculation visualized by VESTA softwareMomma:db5098.