  The spin-dependent conductance and spin-polarization of a MoS2 quantum dot
are studied in presence (absent) of an external electric field perpendicular to
the molybdenum plane. It is shown that in absence of the electric field, the
deformation of a MoS2 ribbon structure causes spin-splitting in the dot and
non-prefect spin filtering is seen. Therefore, the technique could be used for
designing spin-dependent devices of MoS2. Also, we show that the device could
behave as a prefect spin filter and spin inverter under applying an external
electric.
