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Abstract:
de Haas-van Alphen oscillations were measured in lanthanum tritelluride
(LaTe(3)) to probe the partially gapped Fermi surface (FS) resulting
from charge density wave (CDW) formation. Three distinct frequencies
were observed, one of which can be correlated with a FS sheet that is
unaltered by CDW formation. The other two frequencies arise from FS
sheets that have been reconstructed in the CDW state. All three pockets
are quasi-two-dimensional, consistent with expectations from
band-structure calculations. Analysis of the field dependence of the
oscillations is used to provide an estimate of the geometry of the
reconstructed FS sections.
