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Valleytronics of Molybdenum disulfide

Due to the lack of spatial inversion symmetry, odd-layer MoS2 is a promising material for valleytronics because both the CBM and VBM have two energy-degenerate valleys at the corners of the first Brillouin zone, providing an exciting opportunity to store the information of 0s and 1s at different discrete values of the crystal momentum. The Berry curvature is even under spatial inversion (P) and odd under time reversal (T); the valley Hall effect cannot survive when both P and T symmetries are present. Circularly polarized lights were used to break the T symmetry in atomically thin transition-metal dichalcogenides to excite the valley Hall effect in specific valleys. In monolayer MoS2, the T and mirror symmetries lock the spin and valley indices of the sub-bands split by the spin-orbit couplings, both flipped under T; the spin conservation suppresses the inter-valley scattering. Therefore, monolayer MoS2 has been deemed an ideal platform for realizing the intrinsic valley Hall effect without extrinsic symmetry breaking. MoS2 also possesses mechanical strength and electrical conductivity and can emit light, opening possible applications such as photodetectors. MoS2 has been investigated as a component of photoelectrochemical (e.g., for photocatalytic hydrogen production) applications and for microelectronics applications. Under an electric field, MoS2 monolayers have been found to superconduct at temperatures below 9.4 K. If you are looking for high quality, high purity, and cost-effective Molybdenum disulfide or require the latest price of Molybdenum disulfide, please feel free to email contact mis-asia.

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