Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 253, Issue 12, Pages 2509-2514Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201600437
Keywords
absorption edge; black phosphorus; density of states; electron energy-loss spectroscopy; scanning transmission electron microscopy
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Funding
- Italian Ministry of Education and Research (MIUR) [PON a3_00363]
- US Department of Energy [DE-SC0014208]
- U.S. Department of Energy (DOE) [DE-SC0014208] Funding Source: U.S. Department of Energy (DOE)
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We have studied the excited states of black phosphorus through the analysis of K and L absorption edges of black phosphorus with energy-filtered transmission electron microscopy. Energy-loss spectra exhibit several peaks reflecting features in the density of conduction-band states at corresponding energies above the vacuum level. We have reproduced the experimental electron energy-loss near-edge structures by means of ab initio self-consistent real-space multiple-scattering theory. The comparison of the calculated symmetry-projected density of unoccupied states and electron energy loss spectra allowed us to assign the spectral features to transitions to specific electronic states.
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