Characterization of the Edge States in Colloidal Bi<sub>2</sub>Se<sub>3</sub> Platelets - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nano Letters Année : 2024

Characterization of the Edge States in Colloidal Bi2Se3 Platelets

Résumé

The remarkable development of colloidal nanocrystals with controlled dimensions and surface chemistry has resulted in vast optoelectronic applications. But can they also form a platform for quantum materials, in which electronic coherence is key? Here, we use colloidal, two-dimensional Bi2Se3 crystals, with precise and uniform thickness and finite lateral dimensions in the 100 nm range, to study the evolution of a topological insulator from three to two dimensions. For a thickness of 4–6 quintuple layers, scanning tunneling spectroscopy shows an 8 nm wide, nonscattering state encircling the platelet. We discuss the nature of this edge state with a low-energy continuum model and ab initio GW-Tight Binding theory. Our results also provide an indication of the maximum density of such states on a device.
Fichier principal
Vignette du fichier
moes-et-al-2024-characterization-of-the-edge-states-in-colloidal-bi2se3-platelets_NL_24.pdf (11.26 Mo) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-04575158 , version 1 (14-05-2024)

Licence

Paternité

Identifiants

Citer

Jesper R Moes, Jara F Vliem, Pedro M M C de Melo, Thomas C Wigmans, Andrés R Botello-Méndez, et al.. Characterization of the Edge States in Colloidal Bi2Se3 Platelets. Nano Letters, 2024, 24 (17), pp.5110 - 5116. ⟨10.1021/acs.nanolett.3c04460⟩. ⟨hal-04575158⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More