Hidden one dimensionality in Fermi surfaces ofη−Mo4O11observed by Compton scattering experiments

Abstract

We have investigated Fermi surfaces of a low-dimensional Mo oxide, $\ensuremath{\eta}\text{\ensuremath{-}}{\mathrm{Mo}}_{4}{\mathrm{O}}_{11}$, using Compton scattering. The Fermi surfaces projected onto the ${a}^{*}$ plane, obtained from the two-dimensional reconstruction method, show a good agreement with those predicted by a previous band-theory study. Hidden one dimensionality, which is the most important feature in explaining the charge-density wave behavior in this material, is clearly observed in the experimentally obtained Fermi surfaces.