The Fermi surface (FS) of URu2 Si2 in the paramagnetic phase has been reinvestigated via the measurement of the two-dimensional angular correlation of the positron annihilation radiation. Unlike previous measurements our experiment provides evidence that density-functional theory gives a fair qualitative description of the FS, showing a large contribution from the 5f electrons, although the Fermi volume of electron and hole pockets determined experimentally is smaller than the theoretical description. Furthermore, we propose a method to investigate the nature of the hidden order responsible for the 17.5 K transition.
|Titolo:||Positron Annihilation Study of the Electronic Structure of URu2 Si2: Fermi Surface and Hidden Order Parameter|
|Data di pubblicazione:||2-feb-2009|
|Appare nelle tipologie:||1.1 Articolo in rivista|