Unknown

Dataset Information

0

Resolving the topological classification of bismuth with topological defects.


ABSTRACT: The growing diversity of topological classes leads to ambiguity between classes that share similar boundary phenomenology. This is the status of bulk bismuth. Recent studies have classified it as either a strong or a higher-order topological insulator, both of which host helical modes on their boundaries. We resolve the topological classification of bismuth by spectroscopically mapping the response of its boundary modes to a screw-dislocation. We find that the one-dimensional mode, on step-edges, extends over a wide energy range and does not open a gap near the screw-dislocations. This signifies that this mode binds to the screw-dislocation, as expected for a material with nonzero weak indices. We argue that the small energy gap, at the time reversal invariant momentum L, positions bismuth within the critical region of a topological phase transition between a higher-order topological insulator and a strong topological insulator with nonzero weak indices.

SUBMITTER: Nayak AK 

PROVIDER: S-EPMC6824853 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC4038835 | biostudies-literature
| S-EPMC8249560 | biostudies-literature
| S-EPMC10796077 | biostudies-literature
| S-EPMC8865799 | biostudies-literature
| S-EPMC5453268 | biostudies-other
| S-EPMC7033136 | biostudies-literature
| S-EPMC5414351 | biostudies-literature
| S-EPMC8019060 | biostudies-literature
| S-EPMC9334299 | biostudies-literature
| S-EPMC8053966 | biostudies-literature