Surface buckling of black phosphorus: Determination, origin, and influence on electronic structure
- Univ. of New Hampshire, Durham, NH (United States)
- Columbia Univ., New York, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
The surface structure of black phosphorus materials is determined using surface-sensitive dynamical microspot low energy electron diffraction ( μ LEED ) analysis using a high spatial resolution low energy electron microscopy (LEEM) system. Samples of (i) crystalline cleaved black phosphorus (BP) at 300 K and (ii) exfoliated few-layer phosphorene (FLP) of about 10 nm thickness which were annealed at 573 K in vacuum were studied. In both samples, a significant surface buckling of 0.22 Å and 0.30 Å, respectively, is measured, which is one order of magnitude larger than previously reported. As direct evidence for large buckling, we observe a set of (for the flat surface forbidden) diffraction spots. Using first-principles calculations, we find that the presence of surface vacancies is responsible for the surface buckling in both BP and FLP, and is related to the intrinsic hole doping of phosphoresce materials previously reported.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; FG 02-04-ER-46157; SC0016424
- OSTI ID:
- 1425024
- Alternate ID(s):
- OSTI ID: 1416443
- Report Number(s):
- BNL-200011-2018-JAAM; PRMHAR; TRN: US1802006
- Journal Information:
- Physical Review Materials, Vol. 1, Issue 7; ISSN 2475-9953
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Facile bottom-up synthesis of partially oxidized black phosphorus nanosheets as metal-free photocatalyst for hydrogen evolution
Host layer buckling in the compounds formed by exfoliation and restacking of cadmium phosphorus trisulphide with adenosine monophosphate included