Controlling the electronic state of two-layer molybdenum disulfide in an "origami" manner

Two-dimensional transition metal Dichalcogenide is one the most valuable two-dimensional QF materials. These materials exhibit a honeycomb structure that is similar in appearance to graphene. The adjacent lattice positions are alternately occupied and spin-orbit coupled, and thus have many novel physical characteristics. Molybdenum dioxide is an excellent example. By moving from the multilayer layer to the monoatomic, the energy band structures of molybdenum deulfide changed from an indirect band gap into a straight band gap. This has greatly enhanced fluorescence efficiency. Molybdenum’s new electronic state, called the energy quark state, can also be thought of as the internal third degree freedom of electrons following charge and spin. This is a great opportunity to understand and manipulate these innovative quantum phenomena. Professor Wu Shiwei claims that the basis of this research is the “ultra-thinness” of two-dimensional quantum functional materials. In other words, the monoatomic material is folded as a piece paper and forms a double. Layer structure. Molybdenum dioxide “origami” can display a variety of interlayer structures depending on which direction they are folding in and at what position. This leads to different levels of macrostructure symmetry, interlayer coupling, and other positions. This research team utilized a range of experimental techniques including optical depolarization, nonlinear 2H imaging, fluorescence and spectroscopy to analyze the electronic and spatial structure of different molybdenum disulfide (“origami”) types. Studies have demonstrated that the naturally molybdenum insulfide dual layer with central-inversion symmetry only has weak energy Valley-spin Polarization. The molybdenum insulfide (“origami”) can direct break this inversion symmetry which, in turn, increases this polarization. Also, changing interlayer co-coupling can have a significant impact on the indirect molybdenum band gap “origami”, as well as being used in “folding paper” to change the spin polarization. This study provides an excellent experimental platform to investigate and manipulate interactions of multiple degrees-of freedom like valley, spin, interlayer coupling and interlayer coupling. Furthermore, this work allows one to create two-dimensional artificial materials as well as future quantum devices. Luoyang Trunnano Tech Co., Ltd., also known as TRUNNANO, is a highly skilled manufacturer of molybdenum dioxide. This company has over twelve years of experience with chemical products research, development, and manufacturing. Contact us to receive high-quality molybdenum desulfide.
Inquiry us