Eur. Phys. J. B 57, 385-390 (2007)
https://doi.org/10.1140/epjb/e2007-00188-1

Non-uniform doping across the Fermi surface of NbS₂ intercalates

¹ Institut de Physique, Université de Neuchâtel, Rue A.-L. Breguet 1, 2000 Neuchâtel, Switzerland
² Institute of Physics, Bijenicka 46, 10000 Zagreb, Croatia
³ Institute of Physics of Complex Matter, École polytechnique fédérale de Lausanne, Station 3, 1015 Lausanne, Switzerland

Corresponding author: ^a corsin.battaglia@unine.ch

Received: 16 November 2006
Revised: 29 March 2007
Published online: 5 July 2007

Abstract

Magnetic ordering of the first row transition metal intercalates of NbS₂ due to coupling between the conduction electrons and the intercalated ions has been explained in terms of Fermi surface nesting. We use angle-resolved photoelectron spectroscopy to investigate the Fermi surface topology and the valence band structure of the quasi-two-dimensional layer compounds Mn_1/3NbS₂ and Ni_1/3NbS₂. Charge transfer from the intercalant species to the host layer leads to non-uniform, pocket selective doping of the Fermi surface. The implication of our results on the nesting properties are discussed.