Dresden 2020 – scientific programme
The DPG Spring Meeting in Dresden had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 10: Nanotubes and Nanoribbons
TT 10.4: Talk
Monday, March 16, 2020, 12:15–12:30, HSZ 204
Spin-Orbit Coupling modulations near edges: emergence of massive edge states — •Tineke L. van den Berg1, M. Reyes Calvo2, Alessandro De Martino3, and Dario Bercioux1,4 — 1Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain — 2Departamento de Fisica Aplicada, Universidad de Alicante, 03690 Alicante, Spain — 3Department of Mathematics, City, University of London, London EC1V 0HB, United Kingdom — 4IKERBASQUE, Basque Foundation of Science, E-48011 Bilbao, Spain
In topological two-dimensional systems, gap modification near system edges, can lead to the appearance of massive edge states, as we have shown in earlier work [1]. In graphene, it is the Kane-Mele Spin-Orbit Coupling (SOC) that leads to the opening of a topological gap [2]. Here we will deal with systems subject to inhomogeneous SOC. In zigzag nanoribbons, smooth spatial modification of SOC near the edges results in in-gap massive edge states at the K and K′ points. In armchair nanoribbons, such massive states appear at the Γ point. We analyse the properties of these states, and propose how to measure and tune them [3].
[1] C. L. Kane and E. J. Mele, PRL. 95, 226801 (2005).
[2] T. L. van den Berg, M. R. Calvo and D. Bercioux, arXiv:1911.09363.
[3] T. L. van den Berg et al. in preparation