Research on valley selective circularly polarized light absorption properties of monolayer molybdenum disulfide: Promoting the application of molybdenum disulfide in the field of optoelectronics

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Nature Communications recently published the article "Valley selective circular dichroism of monolayer molybdenum disorder," which was jointly written by researchers Feng Ji and Professor Wang Enge from the International Center for Quantum Materials Science of Peking University and the Institute of Physics and the Institute of Semiconductor of the Chinese Academy of Sciences.This research is the first to theoretically predict and experimentally confirm the valley selective circularly polarized light absorption properties of monolayer molybdenum disulfide, which is of great significance for developing the new generation of electronics - valley electronics.

This study has discovered the optical rotation selectivity of valleys in materials for the first time, which is of great significance for developing the new generation of electronics - valley electronics. Previously, the biggest challenge in applying valley electronics was that valley polarization had not yet been achieved in single-layer atomic thin films, and the valley selective circularly polarized light absorption characteristics of single-layer molybdenum disulfide precisely solved this problem. The optical Hall effect of the material has built a bridge between optoelectronics and valley electronics applications in single-layer molybdenum disulfide.

The first author of this work is Cao Ting, an undergraduate student from Yuanpei College under the guidance of Professor Wang Enge and Researcher Feng Ji. The corresponding originator of this paper is Professor Feng Ji and Professor Wang Enge. Other authors include Professor Shi Junren and Professor Niu Qian from the International Center for Quantum Materials Science at Peking University. Liu Baoli and Tan Hengping, researchers from the Institute of Physics and the Institute of Semiconductor of the Academia Sinica, designed and completed experiments to verify the theory.

Lubricants:

Due to its excellent performance, the Molybdenum disulfide is widely used in various lubrication situations for sliding, rolling, and reciprocating friction. Due to its solid lubricant properties can work in extreme environments such as high and low temperatures, high vacuum, and strong radiation, making it an important lubricating material in high-tech fields such as aerospace, nuclear energy, and petrochemicals.

Additives:

Molybdenum disulfide can be used as an additive to improve the performance of certain high-temperature oil products, fuels, and hydraulic oils. It can effectively decrease the friction coefficient, reduce wear, and improve oil products' load-bearing capacity and thermal stability.

Pigments and Coatings:

As a black pigment, molybdenum disulfide is widely used in fields such as coatings, inks, and plastics. It has bright colors, pure tones, good covering and coloring power.

Electronics and Semiconductor Industry:

Molybdenum disulfide is used as a conductive and heat sink material at high temperatures in the electronics and semiconductor industries. It has marvelous thermal stability and electrical insulation performance, which can meet the requirements of high temperature, high purity, and high reliability in these industries.

Composite materials:

Molybdenum disulfide can be added as a reinforcing agent or filler to various composite materials, such as plastics, rubber, and ceramics. It can improve composite materials' mechanical properties, thermal stability, and electrical properties.

Chemical industry:

In the chemical industry, molybdenum disulfide can be used as a catalyst, dehydrating agent, and desulfurizer. It has marvelous chemical stability and corrosion resistance and can play an efficient role in various chemical reactions.

Supplier

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