Tuning the bandgap in layered transition metal dichalcogenides(TMDCs) is crucial for their versatile applications in many fields. The ternary formation is a viable method to tune the bandgap as well as other intrinsic...Tuning the bandgap in layered transition metal dichalcogenides(TMDCs) is crucial for their versatile applications in many fields. The ternary formation is a viable method to tune the bandgap as well as other intrinsic properties of TMDCs, because the multi-elemental characteristics provide additional tunability at the atomic level and advantageously alter the physical properties of TMDCs. Herein, ternary Ti_(x)Zr_(1-x)Se_(2) single crystals were synthesized using the chemical-vapor-transport method. The changes in electronic structures of ZrSe_(2) induced by Ti substitution were revealed using angle-resolved photoemission spectroscopy. Our data show that at a low level of Ti substitution, the bandgap of Ti_(x)Zr_(1-x)Se_(2) decreases monotonically, and the electronic system undergoes a transition from a semiconducting to a metallic state without a significant variation of dispersions of valence bands. Meanwhile, the size of spin-orbit splitting dominated by Se 4p orbitals decreases with the increase of Ti doping. Our work shows a convenient way to alter the bandgap and spin-orbit coupling in TMDCs at the low level of substitution of transition metals.展开更多
A fundamentally crucial suggestion to rectify the fits to the high-resolution X-ray photoemission spectroscopy(XPS)raw data for the S 2p core level published by Chen et al.(Nano Res.2023,16,10567-10572)is presented he...A fundamentally crucial suggestion to rectify the fits to the high-resolution X-ray photoemission spectroscopy(XPS)raw data for the S 2p core level published by Chen et al.(Nano Res.2023,16,10567-10572)is presented herein.展开更多
基金supported by the National Key R&D Program of China (Grant No. 2017YFA0402901)the National Natural Science Foundation of China (Grant No. U2032153)+2 种基金the International Partnership Program (Grant No. 211134KYSB20190063)the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB25000000)the USTC Research Funds of the Double First-Class Initiative (Grant No. YD2310002004)。
文摘Tuning the bandgap in layered transition metal dichalcogenides(TMDCs) is crucial for their versatile applications in many fields. The ternary formation is a viable method to tune the bandgap as well as other intrinsic properties of TMDCs, because the multi-elemental characteristics provide additional tunability at the atomic level and advantageously alter the physical properties of TMDCs. Herein, ternary Ti_(x)Zr_(1-x)Se_(2) single crystals were synthesized using the chemical-vapor-transport method. The changes in electronic structures of ZrSe_(2) induced by Ti substitution were revealed using angle-resolved photoemission spectroscopy. Our data show that at a low level of Ti substitution, the bandgap of Ti_(x)Zr_(1-x)Se_(2) decreases monotonically, and the electronic system undergoes a transition from a semiconducting to a metallic state without a significant variation of dispersions of valence bands. Meanwhile, the size of spin-orbit splitting dominated by Se 4p orbitals decreases with the increase of Ti doping. Our work shows a convenient way to alter the bandgap and spin-orbit coupling in TMDCs at the low level of substitution of transition metals.
基金funded by the Community of Madrid(CM)through Project MAD2D-CM.
文摘A fundamentally crucial suggestion to rectify the fits to the high-resolution X-ray photoemission spectroscopy(XPS)raw data for the S 2p core level published by Chen et al.(Nano Res.2023,16,10567-10572)is presented herein.
