Identifying the alloy structures of germanene grown on Al(111)

Yan，Feini; Xu，Shaogang; He，Chao; He，Changchun; Zhao，Changming; Xu，Hu

2022-08-15

10.1103/PhysRevB.106.075405

Physical Review B   影响因子和分区

2469-9950

2469-9969

While the growth of germanene has been extensively claimed on many substrates, their exact crystal structures remain controversial. Herein, we systematically explore the surface structures of Ge deposition onto the Al(111) surface by theoretical calculations combined with available scanning tunneling microscopy (STM) and low-energy electron diffraction data. We show that the formation of germanene on Al(111) is energetically unfavorable by abinitio evolutionary simulations and high-level random-phase approximation calculations, and the two experimental phases are identified as honeycomb alloys Al3Ge3/Al(7×7) and Al3Ge4/Al(3×3). It is interesting to find a vacancy at the interface of Al3Ge4/Al(3×3), which is responsible for the dark clover pattern in STM experiments. Our results clarify the structural controversy of the Ge/Al(111) system and indicate that the fabrication of germanene on Al(111) remains challenging.

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[11974160] ; Science, Technology, and Innovation Commission of Shenzhen Municipality[RCYX20200714114523069]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000862891900004

AMER PHYSICAL SOC

20223412614258

Electrons ; Germanium alloys ; Scanning tunneling microscopy

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Mathematics:921

PHYSICS

2-s2.0-85136214129

Scopus

Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Yan，Feini,Xu，Shaogang,He，Chao,et al. Identifying the alloy structures of germanene grown on Al(111)[J]. Physical Review B,2022,106(7).

Yan，Feini,Xu，Shaogang,He，Chao,He，Changchun,Zhao，Changming,&Xu，Hu.(2022).Identifying the alloy structures of germanene grown on Al(111).Physical Review B,106(7).

Yan，Feini,et al."Identifying the alloy structures of germanene grown on Al(111)".Physical Review B 106.7(2022).