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Electronic band structure of surface-doped black phosphorus
- Source :
- Journal of Electron Spectroscopy and Related Phenomena. 219:86-91
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- We present an overview on the electronic band structure of surface-doped black phosphorus. Angle-resolved photoemission spectroscopy data show that the in situ deposition of potassium atoms on the surface of single-crystalline black phosphorus modulates the band gap in the wide range of 0.0–0.6 eV. At zero band gap, the surface layers of black phosphorus become a Dirac semimetal whose band dispersion is highly anisotropic, linear in armchair and quadratic in zigzag directions. In light of theoretical band calculations, we elucidate the mechanism of these band modifications as the giant Stark effect due to strong vertical electric fields induced by potassium atoms.
- Subjects :
- Radiation
Materials science
Condensed matter physics
Photoemission spectroscopy
Band gap
Doping
Angle-resolved photoemission spectroscopy
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
Semimetal
Electronic, Optical and Magnetic Materials
Condensed Matter::Materials Science
symbols.namesake
Stark effect
0103 physical sciences
symbols
Direct and indirect band gaps
Physical and Theoretical Chemistry
010306 general physics
0210 nano-technology
Electronic band structure
Spectroscopy
Subjects
Details
- ISSN :
- 03682048
- Volume :
- 219
- Database :
- OpenAIRE
- Journal :
- Journal of Electron Spectroscopy and Related Phenomena
- Accession number :
- edsair.doi...........307756d3ce0152703f6f3a2d43606a5b