Title: Anisotropic Fermi surface probed by the de Haas-van Alphen oscillation in proposed Dirac Semimetal TaSb$_{2}$,
Abstract: TaSb$_{2}$ has been predicted theoretically and proposed through
magnetotransport experiment to be a topological semimetal. In earlier reports,
the Shubnikov-de Haas oscillation has been analyzed to probe the Fermi surface,
with magnetic field along a particular crystallographic axis only. By employing
a sample rotator, we reveal highly anisotropic transverse magnetoresistance by
rotating the magnetic field along different crystallographic directions. To
probe the anisotropy in the Fermi surface, we have performed magnetization
measurements and detected strong de Haas-van Alphen (dHvA) oscillations for the
magnetic field applied along \textbf{b} and \textbf{c} axes as well as
perpendicular to \textbf{bc} plane of the crystals. Three Fermi pockets have
been identified by analyzing the dHvA oscillations. Hall measurement reveals
electron as the only charge carrier, i.e., all the three Fermi pockets are
electron type. With the application of magnetic field along different crystal
directions, the cross sectional areas of the Fermi pockets have been found
significantly different. Other physical parameters, such as the effective mass
of the charge carrier and Fermi velocity have also been calculated using the
Lifshitz-Kosevich formula.