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(a) Topography and (b) dI=dU map measured at the Dirac point (Uset ¼ 120 mV)) of two intersecting at 90° singlestep edges, both running along the sample’s high symmetry directions. (c) Color-coded raw dI=dU spectra measured along step-edge running in [100] marked with the hatched line in (a);. (d) Second derivative (d3I=dU3) of the same signal in (c). Stabilization parameters: Uset ¼ 120 mV, Iset ¼ 0.2 nA.
In this paper, Tomasz Story, MagTop member, worked in collaboration with scientists from Würzburg university in order to systematically investigate the coupling between one-dimensional edge states of a Topological Crystalline Insulator by using scanning tunneling spectroscopy.
Phys. Rev. Lett. 126, 236402 (2021), arXiv:2105.07774v1 (2021)