%0 Journal Article %1 PhysRevB.107.115130 %A Eck, Philipp %A Fang, Yuan %A Di Sante, Domenico %A Sangiovanni, Giorgio %A Cano, Jennifer %D 2023 %I American Physical Society %J Phys. Rev. B %K a %N 11 %P 115130 %R 10.1103/PhysRevB.107.115130 %T Recipe for higher order topology on the triangular lattice %U https://link.aps.org/doi/10.1103/PhysRevB.107.115130 %V 107 %X We present a recipe for an electronic two-dimensional (2D) higher order topological insulator (HOTI) on a triangular lattice that can be realized in a large family of materials. The essential ingredient is mirror symmetry breaking, which allows for a finite quadrupole moment and trivial Z2 index. The competition between spin-orbit coupling and the symmetry-breaking terms gives rise to four topologically distinct phases; the HOTI phase appears when symmetry breaking dominates, including in the absence of spin-orbit coupling. We identify triangular monolayer adsorbate systems on the (111) surface of zincblende/diamond type substrates as ideal material platforms and predict the HOTI phase for X=(Al,B,Ga) on SiC.

@article{PhysRevB.107.115130, abstract = {We present a recipe for an electronic two-dimensional (2D) higher order topological insulator (HOTI) on a triangular lattice that can be realized in a large family of materials. The essential ingredient is mirror symmetry breaking, which allows for a finite quadrupole moment and trivial Z2 index. The competition between spin-orbit coupling and the symmetry-breaking terms gives rise to four topologically distinct phases; the HOTI phase appears when symmetry breaking dominates, including in the absence of spin-orbit coupling. We identify triangular monolayer adsorbate systems on the (111) surface of zincblende/diamond type substrates as ideal material platforms and predict the HOTI phase for X=(Al,B,Ga) on SiC.}, added-at = {2023-05-16T10:46:37.000+0200}, author = {Eck, Philipp and Fang, Yuan and Di Sante, Domenico and Sangiovanni, Giorgio and Cano, Jennifer}, biburl = {https://www.bibsonomy.org/bibtex/209cf6a026263454532cede19f86b81e3/ctqmat}, day = 14, description = {Recipe for higher order topology on the triangular lattice}, doi = {10.1103/PhysRevB.107.115130}, interhash = {f5d079b8c3491bfae61efba93ee586d9}, intrahash = {09cf6a026263454532cede19f86b81e3}, journal = {Phys. Rev. B}, keywords = {a}, month = {03}, number = 11, numpages = {10}, pages = 115130, publisher = {American Physical Society}, timestamp = {2023-05-17T11:27:50.000+0200}, title = {Recipe for higher order topology on the triangular lattice}, url = {https://link.aps.org/doi/10.1103/PhysRevB.107.115130}, volume = 107, year = 2023 }