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The spin degree of freedom plays an important role in electron correlation. Recently, a high-resolution photoelectron spectrometer was equiped with a fully three-dimensional spin polarimeter [1] in order to study such effects. In my talk I will discuss various sources of spin polarization in photoemission experiments and how they relate to properties of the ground state, the excited state or to extrinsic processes. Examples will include spin-dependent many-body effects in Ni and Co metal [2,3] and the observation of spin polarization and spin structures in the Rashba-split surface state on Au(111) [4,5].
[1] M. Hoesch et al., J. Electron Spectrosc. 124 (202) 263. [2] F. Manghi et al., Phys. Rev. B 59 (1999) R10409. [3] S. Monastra et al., Phys. Rev. Lett. 88 (2002) 236402. [4] M. Hoesch et al., Phys. Rev. B 69 (2004) R241401. [5] J. Henk et al., J. Phys.: Condens. Matter 16 (2004) 7581. |