  This work reports an experimental study on an antiferromagnetic honeycomb
lattice of MnPS$_3$ that couples the valley degree of freedom to a macroscopic
antiferromagnetic order. The crystal structure of MnPS$_3$ is identified by
high resolution scanning transmission electron microscopy. Layer dependent
angle resolved polarized Raman fingerprints of the MnPS$_3$ crystal are
obtained and the Raman peak at 383 cm$^{-1}$ exhibits 100% polarity.
Temperature dependences of anisotropic magnetic susceptibility of MnPS$_3$
crystal are measured in superconducting quantum interference device. Magnetic
parameters like effective magnetic moment, and exchange interaction are
extracted from the mean field approximation mode. Ambipolar electronic
transport channels in MnPS$_3$ are realized by the liquid gating technique. The
conducting channel of MnPS$_3$ offers a unique platform for exploring the
spin/valleytronics and magnetic orders in 2D limitation.
