Fig. 3 Band dispersions along on the KHgSb (010) surface.

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Fig. 3 Band dispersions along on the KHgSb (010) surface. Band dispersions along on the KHgSb (010) surface. (A) ARPES intensity plot at EF recorded along by varying the photon energy from 20 to 100 eV on the (010) surface, which maps the kx-ky plane at kz = 0 of the 3D bulk BZ. The overlaid hexagons indicate the BZ structure in the kx-ky plane. (B and C) Band dispersions along cuts 1 and 2 indicated in (A), recorded with photon energy hv = 22 and 56 eV, respectively. The solid curves represent the calculated bulk bands along Γ − M. Note that the chemical potential on the (010) surface is slightly different from that on the (001) surface, most likely because of different surface chemistry effects. (D) Band dispersions along kx at different ky positions recorded with different photon energies from 22 to 56 eV. The dashed curve indicates the dispersion of one representative bulk band along Γ − K − M. (E) Calculated bulk bands along Γ − K − M. The red curves indicate the calculated bulk bands that correspond to the experimental band dispersion indicated in (D). (F) Near-EF band dispersions along kx at different ky positions recorded with different photon energies from 56 to 78 eV, showing a Dirac-like surface state band along . The momentum locations are indicated in (A). Junzhang Ma et al. Sci Adv 2017;3:e1602415 Published by AAAS