Synthesis of Two-Dimensional MoO 2 Nanoplates with Large Linear Magnetoresistance and Nonlinear Hall Effect.

Two-dimensional (2D) materials with large linear magnetoresistance (LMR) are very interesting owing to their potential application in magnetic storage or sensor devices. Here, we report the synthesis of 2D MoO 2 nanoplates grown by a chemical vapor deposition (CVD) method and observe large LMR and nonlinear Hall behavior in MoO 2 nanoplates. As-obtained MoO 2 nanoplates exhibit rhombic shapes and high crystallinity. Electrical studies indicate that MoO 2 nanoplates feature a metallic nature with an excellent conductivity of up to 3.7 × 10 7 S m -1 at 2.5 K. MoO 2 nanoplates display a large LMR of up to 455% at 3 K and -9 T. A thickness-dependent LMR analysis suggests that LMR values increase upon increasing the thickness of nanoplates. Besides, nonlinearity has been found in the magnetic-field-dependent Hall resistance, which decreases with increasing temperatures. Our studies highlight that MoO 2 nanoplates are promising materials for fundamental studies and potential applications in magnetic storage devices.