Abstract
We have investigated the structural and electronic properties of the α-GeSe surface using atomic force microscopy, scanning tunneling microscopy and density functional theory calculations. GeSe belongs to the group-VI transition metal monochalcogenides and occurs in two polymorphs, α-GeSe and β-GeSe. The most redundant polymorph, α-GeSe, has a structure that is very similar to black phosphorene. The α-GeSe surface has a centered rectangular unit cell with dimensions a = 3.8 Å and b = 4.4 Å respectively. In scanning tunneling microscopy images only the Se atoms are resolved owing to the substantial transfer of electrons from the Ge to the Se surface atoms. This experimental finding is fully in line with density functional theory calculations. Scanning tunneling spectroscopy reveals that the α-GeSe surface is a p-type semiconductor with a band gap of 1.0 eV. The GeSe surface is stable at ambient conditions, which makes this material very appealing for technological applications.
| Original language | English |
|---|---|
| Pages (from-to) | 17-21 |
| Number of pages | 5 |
| Journal | Surface science |
| Volume | 686 |
| Early online date | 27 Mar 2019 |
| DOIs | |
| Publication status | Published - 1 Aug 2019 |
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Keywords
- Scanning tunneling microscopy
- Semiconductor
- Transition metal monochalcogenide
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Structural and electronic properties of the α-GeSe surface. / Jiao, Zhen; Yao, Qirong; Balescu, Liliana M.; Liu, Qijun; Tang, Bin; Zandvliet, Harold J.W. (Corresponding Author).
In: Surface science, Vol. 686, 01.08.2019, p. 17-21.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Structural and electronic properties of the α-GeSe surface
AU - Jiao, Zhen
AU - Yao, Qirong
AU - Balescu, Liliana M.
AU - Liu, Qijun
AU - Tang, Bin
AU - Zandvliet, Harold J.W.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - We have investigated the structural and electronic properties of the α-GeSe surface using atomic force microscopy, scanning tunneling microscopy and density functional theory calculations. GeSe belongs to the group-VI transition metal monochalcogenides and occurs in two polymorphs, α-GeSe and β-GeSe. The most redundant polymorph, α-GeSe, has a structure that is very similar to black phosphorene. The α-GeSe surface has a centered rectangular unit cell with dimensions a = 3.8 Å and b = 4.4 Å respectively. In scanning tunneling microscopy images only the Se atoms are resolved owing to the substantial transfer of electrons from the Ge to the Se surface atoms. This experimental finding is fully in line with density functional theory calculations. Scanning tunneling spectroscopy reveals that the α-GeSe surface is a p-type semiconductor with a band gap of 1.0 eV. The GeSe surface is stable at ambient conditions, which makes this material very appealing for technological applications.
AB - We have investigated the structural and electronic properties of the α-GeSe surface using atomic force microscopy, scanning tunneling microscopy and density functional theory calculations. GeSe belongs to the group-VI transition metal monochalcogenides and occurs in two polymorphs, α-GeSe and β-GeSe. The most redundant polymorph, α-GeSe, has a structure that is very similar to black phosphorene. The α-GeSe surface has a centered rectangular unit cell with dimensions a = 3.8 Å and b = 4.4 Å respectively. In scanning tunneling microscopy images only the Se atoms are resolved owing to the substantial transfer of electrons from the Ge to the Se surface atoms. This experimental finding is fully in line with density functional theory calculations. Scanning tunneling spectroscopy reveals that the α-GeSe surface is a p-type semiconductor with a band gap of 1.0 eV. The GeSe surface is stable at ambient conditions, which makes this material very appealing for technological applications.
KW - Scanning tunneling microscopy
KW - Semiconductor
KW - Transition metal monochalcogenide
UR - http://www.scopus.com/inward/record.url?scp=85063695148&partnerID=8YFLogxK
U2 - 10.1016/j.susc.2019.03.007
DO - 10.1016/j.susc.2019.03.007
M3 - Article
VL - 686
SP - 17
EP - 21
JO - Surface science
JF - Surface science
SN - 0039-6028
ER -