DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2022 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 7: (Quantum) Transport Properties

HL 7.6: Talk

Monday, September 5, 2022, 16:45–17:00, H31

Structure-imposed electronic topology in cove-edged graphene nanoribbons — •Florian Arnold1, Tsai-Jung Liu1, Agnieszka Kuc2, and Thomas Heine1,2,31Technische Universität Dresden, Dresden, Germany — 2HZDR, Leipzig, Germany — 3Yonsei University, Seoul, Republic of Korea

Cove-edged zigzag graphene nanoribbons (ZGNR-C) take their name from a regular pattern of coves which is formed by removing one terminal CH group per length unit on each zigzag edge. Based on three structural parameters that unambiguously characterize the atomistic structure of ZGNR-C, we present a scheme that classifies their electronic state, i.e., if they are metallic, topological insulators or trivial semiconductors, for all possible widths N, unit lengths a and cove position offsets at both edges b, thus showing the direct structure-electronic structure relation. We further present an empirical formula to estimate the band gap of the semiconducting ribbons from N, a, and b. Finally, we show possible ribbon terminations, which should give guidance for future synthetic efforts to realize new topological ZGNR-C with large band gap and to realize topologically protected edge states in these systems.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2022 > Regensburg