2026-10-13T06:26:07Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34036789 2026-09-30T20:07:47Z category_4 category_7 category_272 category_39 category_734 category_811 category_133 portal_63 item_type_6 month_year_09_2026

Protected Metallic Edge States in a Graphene-Capped Quantum Spin Hall System Huu Thoai Ngo (18710353) Zamin Mamiyev (8770256) Niclas Tilgner (25146034) Andres David Peña Unigarro (25146037) Sibylle Gemming (2065252) Thomas Seyller (1690516) Christoph Tegenkamp (1609159) Biochemistry Medicine Environmental Sciences not elsewhere classified Ecology Biological Sciences not elsewhere classified Mathematical Sciences not elsewhere classified Plant Biology spectroscopic measurements demonstrate providing environmental protection electronic correlation effects defined edge terminations dimensional topological insulator results establish graphene realize bismuthene islands graphene overlayer interacts underlying bismuthene layer layer graphene topological character capped bismuthene yielding well tunable platform promising two hydrogen treatment hosts symmetry Epitaxial bismuthene on SiC(0001) hosts symmetry-protected metallic edge states within a large bulk band gap, establishing it as a promising two-dimensional topological insulator for high-temperature quantum spin Hall (QSH) transport. Here we realize bismuthene islands by intercalating Bi beneath zero-layer graphene on SiC(0001) followed by hydrogen treatment, yielding well-defined edge terminations. Spectroscopic measurements demonstrate the metallic edge states originating from the underlying bismuthene layer. The graphene overlayer interacts only weakly with the bismuthene, preserving its topological character while providing environmental protection. Overall, our results establish graphene-capped bismuthene as a robust and tunable platform for studying correlated quantum states, with the one-dimensional edge channels exhibiting signatures of electronic correlation effects. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/acsnano.6c14197.s001 https://figshare.com/articles/journal_contribution/Protected_Metallic_Edge_States_in_a_Graphene-Capped_Quantum_Spin_Hall_System/34036789 CC BY-NC 4.0