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Figure 4
Spatially resolved ARPES of graphene grown on a heterostructure of two-dimensional materials, courtesy of N. Wilson and N. Teutsch at the University of Warwick. (a) Optical micrograph of the heterostructure with outlined borders of the layers. The bottom layer is BN (blue) covered with multilayer WS2 (orange) and monolayer WS2 (red) at the same level. A graphene layer (green) is on top of the heterostructure. (b) Total electron yield map from the integrated intensity on the two-dimensional detector. The red rectangle outlines the few micrometres area where the flake consisting of monolayer WS2 is isolated without any other layer on top or below. The contrast of the image is the result of interplay between electronic dispersions of the materials composing the heterostructure. (c) High-symmetry cut from electronic dispersion measured on the area indicated in (b) at a photon energy of 70 eV.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 2| March 2019| Pages 467-472
https://doi.org/10.1107/S1600577519000869
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