TY - JOUR
T1 - Edge-Dependent Topology in Kekulé Lattices
AU - Freeney, S. E.
AU - Van Den Broeke, J. J.
AU - Harsveld Van Der Veen, A. J.J.
AU - Swart, I.
AU - Morais Smith, C.
PY - 2020/6/12
Y1 - 2020/6/12
N2 - The boundary states of topological insulators are thought not to depend on the precise atomic structure of the boundary. A recent theoretical study showed that, for topological crystalline insulators with given bond strengths, topological states should only emerge for certain edge geometries. We experimentally probe this effect by creating artificial Kekulé lattices with different atomically well-defined edge geometries and hopping ratios in a scanning tunneling microscope. Topological edge modes are found to only appear for specific combinations of edge geometry and hopping ratio.
AB - The boundary states of topological insulators are thought not to depend on the precise atomic structure of the boundary. A recent theoretical study showed that, for topological crystalline insulators with given bond strengths, topological states should only emerge for certain edge geometries. We experimentally probe this effect by creating artificial Kekulé lattices with different atomically well-defined edge geometries and hopping ratios in a scanning tunneling microscope. Topological edge modes are found to only appear for specific combinations of edge geometry and hopping ratio.
UR - https://www.mendeley.com/catalogue/c9c21617-7434-35f9-9239-583adf249556/
U2 - 10.1103/PhysRevLett.124.236404
DO - 10.1103/PhysRevLett.124.236404
M3 - Article
C2 - 32603178
SN - 0031-9007
VL - 124
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 236404
ER -