Fig. 2: Dirac surface states in 8 QL (Bi1-xSbx)2Te3/50 UC FeTe heterostructures with different Sb concentrations x. | Nature Communications

Fig. 2: Dirac surface states in 8 QL (Bi1-xSbx)2Te3/50 UC FeTe heterostructures with different Sb concentrations x.

From: Dirac-fermion-assisted interfacial superconductivity in epitaxial topological-insulator/iron-chalcogenide heterostructures

Fig. 2

a–g Top: In vacuo ARPES band map of 8QL (Bi1-xSbx)2Te3/50UC FeTe/SrTiO3 heterostructures with x = 0 (a), x = 0.2 (b), x = 0.4 (c), x = 0.6 (d), x = 0.7, x = 0.8 (f), x = 1 (g). Bottom: The corresponding MDCs of the band maps in (a–g). SS, surface states. The dashed lines indicate the positions of the peaks in each momentum distribution curve. The linearly dispersed Dirac surface states are observed in all samples. The Dirac point moves from below to above the chemical potential by increasing x. All ARPES measurements are performed at room temperature.

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