Acta Physica Sinica, Volume. 69, Issue 11, 118101-1(2020)
Fig. 2. (a) STM image of germanene on Pt(111); (b) and (c) are the structure and electron localization functions of germanene on Pt(111) surface, respectively; (d) LEED pattern of germanene on Pt(111)[26]; (e) energy versus hexagonal lattice constant of 2D Ge is calculated for various honeycomb structures; (f) and (g) phonon dispersion curves obtained by force-constant and linear response theory are presented by black and dashed green curves, respectively[27].
Fig. 3. (a) Top view of both the top and bottom Sn atoms and its STM image; (b) side view of Sn atoms arrangement (layer A is the top layer, layer B is the sub top layer)[32]; (c) high-resolution STM image of the stanene film; (d) schematic atomic model of the honeycomb stanene; (e) profile along the line in c showing that the adjacent Sn atoms are identical in apparent height; (f) 2D BZs of ultraflat stanene on Cu(111); (g) and (h) ARPES spectra of 0.9 ML stanene on Cu(111) along the
Fig. 4. (a) and (b) are two-dimensional boron sheets structure figures[40]; (c) STM topographic image of boron structures on Ag(111), with a substrate temperature of ~570 K during growth; (d) STM image of boron sheets after annealing the surface in
Fig. 5. (a) STM image and LEED image of hafnium on Ir(111); (b) atomic resolution STM images of hafnium on Ir(111); (c) the 2D charge density in the Hf plane on Ir(111) substrate[43].
Fig. 7. (a) Schematic of monolayer antimonene formed on PdTe2 substrate; (b) STM image of large antimonene island on PdTe2; (c) atomic resolution STM image of monolayer antimonene; (d) XPS results before and after sample exposure to air[53]; (e) the structural model of buck antimonene monolayer and antimonene nanoisland on Cu(111) substrate; (f) side view of panel (e); (g) large-scale STM image and LEED pattern of the antimonene monolayer on Cu(111); (h) atomic resolution STM image of the first buckled layer and island[54].
Fig. 8. (a) STM image of bismuthene on SiC (0001); (b) high resolution STM image for occupied states; (c) bismuthene on SiC(0001) structural model; (d) theoretical band structure and ARPES measurementsts[61].
Fig. 11. (a) Structural model of monolayer MoSe2[80]; (b) DFT optimized monolayer MoSe2 atomic model on Au(111) surface; (c) atomic resolution STM image of monolayer MoSe2; (d) theoretical simulated STM image based on the calculated structure in (b); (e) STM image of singlelayer MoSe2 islands on Au(111) substrate[83]; (f) height profile of MoSe2 islands marked by a dashed blue line in (e).
Fig. 12. (a) Schematic of the fabrication of PtSe2 thin films by a single step of direct selenization of a Pt(111) substrate; (b) LEED pattern of a PtSe2 film formed on the Pt(111) substrate; (c) large-scale STM image shows the Moiré pattern of PtSe2 thin film on Pt(111); (d) atomic resolution STM image of single layer PtSe2[88].
Fig. 14. (a) Schematic of the crystal structure of monolayer WSe2[98]; (b) atomic resolution STM image(75 nm × 75 nm) of WSe2 film; (c) theoretical band structures of monolayer WSe2[100]; (d) photoluminescence of WSe2/Graphene heterostructure[101]; (e) atomic structure of single layer 1H and 1T
Fig. 15. (a) Monolayer VSe2 formed on HOPG substrate; (b) schematic of the fabrication process; (c) d
Fig. 16. (a) Large area and high quality STM image of single layer CuSe; (b) two kinds of triangle holes with opposite orientation and parallelogram holes at boundary; (c) a high resolution STM image of single triangle hole; (d) and (e) STM image of Fe atoms selective adsorption on CuSe surface[110].
Fig. 17. (a) High resolution STM image of monolayer CuSe with 1 D moiré pattern; (b) atomic structure model of free monolayer CuSe; (c), (d) band structure of monolayer CuSe[113].
Fig. 18. (a) STM image of large-scale AgTe monolayer on Ag(111) substrate; (b) LEED pattern of monolayer AgTe on Ag(111); (c) large-scale and (d) atomic resolution STM images of the AgTe on Ag(111) with higher Te coverage, showing the patterned hexagonal structure of AgTe[116].
Fig. 19. (a) STM image of 2D TiTe2 layer on Au(111) substrate; (b) simulated STM image, showing both and (black parallelogram) superstructures[120]; (c) STM image of PdSe2 islands on graphene on SiC(0001)[122]; (d) STM image (500 nm × 500 nm) of Bi2Te3 thin film; (e) structure model of the Bi2Te3 topological insulator[127].
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Xing-Yue Wang, Hui Zhang, Zi-Lin Ruan, Zhen-Liang Hao, Xiao-Tian Yang, Jin-Ming Cai, Jian-Chen Lu.
Received: Feb. 3, 2020
Accepted: --
Published Online: Dec. 2, 2020
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