ARPES and DFT show SmAuAl4Ge2 and TbAuAl4Ge2 have quasi-2D Fermi surfaces well described by the non-magnetic Y analogue, with Tb 4f moments contributing indirectly through exchange splitting.
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Metallic layered materials with magnetic frustration: An ARPES view of the SmAuAl$_4$Ge$_2$ and TbAuAl$_4$Ge$_2$
ARPES and DFT show SmAuAl4Ge2 and TbAuAl4Ge2 have quasi-2D Fermi surfaces well described by the non-magnetic Y analogue, with Tb 4f moments contributing indirectly through exchange splitting.