Phys. Rev. Lett. 104, 246401 (2010) [4 pages]Fermi-Surface Topology and Helical Antiferromagnetism in Heavy Lanthanide MetalsReceived 16 March 2010; published 15 June 2010 Detailed angle-resolved photoemission studies of Tb and Dy metal in the paramagnetic phase provide direct experimental proof of the presence of nesting features in the Fermi surfaces (FS) of these heavy lanthanide (Ln) metals. The observations clearly support the hypothesis that nesting of the FS in the paramagnetic phase is responsible for the development of helical antiferromagnetic ordering in heavy Ln metals. They also show that magnetic exchange splitting of the electronic states is responsible for the disappearance of FS nesting in the ferromagnetic phases. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.104.246401
DOI:
10.1103/PhysRevLett.104.246401
PACS:
71.18.+y, 71.20.Eh, 75.50.Cc, 79.60.-i
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