TY - JOUR
T1 - Resolving Dirac electrons with broadband high-resolution NMR
AU - Papawassiliou, Wassilios
AU - Jaworski, Aleksander
AU - Pell, Andrew J.
AU - Jang, Jae Hyuck
AU - Kim, Yeonho
AU - Lee, Sang Chul
AU - Kim, Hae Jin
AU - Alwahedi, Yasser
AU - Alhassan, Saeed
AU - Subrati, Ahmed
AU - Fardis, Michael
AU - Karagianni, Marina
AU - Panopoulos, Nikolaos
AU - Dolinšek, Janez
AU - Papavassiliou, Georgios
N1 - Funding Information:
W.P., A.J., and A.J.P. were supported by the Swedish Research Council (project no. 2016-03441). M.K. and G.P. acknowledge support by the project MIS 5002567, implemented under the “Action for the Strategic Development on the Research and Technological Sector”, funded by the NSRF 2014–2020 and co-financed by the European Union and Greece. Part of the DFT work was performed using computational resources of the Research Computing Department at Khalifa University. Y.A. would like to acknowledge the support of Khalifa University of Science and Technology Award No. RC2-2018-024. Open access funding provided by Stockholm University.
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Detecting the metallic Dirac electronic states on the surface of Topological Insulators (TIs) is critical for the study of important surface quantum properties (SQPs), such as Majorana zero modes, where simultaneous probing of the bulk and edge electron states is required. However, there is a particular shortage of experimental methods, showing at atomic resolution how Dirac electrons extend and interact with the bulk interior of nanoscaled TI systems. Herein, by applying advanced broadband solid-state 125Te nuclear magnetic resonance (NMR) methods on Bi2Te3 nanoplatelets, we succeeded in uncovering the hitherto invisible NMR signals with magnetic shielding that is influenced by the Dirac electrons, and we subsequently showed how the Dirac electrons spread inside the nanoplatelets. In this way, the spin and orbital magnetic susceptibilities induced by the bulk and edge electron states were simultaneously measured at atomic scale resolution, providing a pertinent experimental approach in the study of SQPs.
AB - Detecting the metallic Dirac electronic states on the surface of Topological Insulators (TIs) is critical for the study of important surface quantum properties (SQPs), such as Majorana zero modes, where simultaneous probing of the bulk and edge electron states is required. However, there is a particular shortage of experimental methods, showing at atomic resolution how Dirac electrons extend and interact with the bulk interior of nanoscaled TI systems. Herein, by applying advanced broadband solid-state 125Te nuclear magnetic resonance (NMR) methods on Bi2Te3 nanoplatelets, we succeeded in uncovering the hitherto invisible NMR signals with magnetic shielding that is influenced by the Dirac electrons, and we subsequently showed how the Dirac electrons spread inside the nanoplatelets. In this way, the spin and orbital magnetic susceptibilities induced by the bulk and edge electron states were simultaneously measured at atomic scale resolution, providing a pertinent experimental approach in the study of SQPs.
UR - https://www.scopus.com/pages/publications/85081642214
U2 - 10.1038/s41467-020-14838-4
DO - 10.1038/s41467-020-14838-4
M3 - Article
C2 - 32152300
AN - SCOPUS:85081642214
SN - 2041-1723
VL - 11
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1285
ER -