Role of a capping layer on the crystalline structure of Sn thin films grown at cryogenic temperatures on InSb substrates - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nanotechnology Année : 2023

Role of a capping layer on the crystalline structure of Sn thin films grown at cryogenic temperatures on InSb substrates

An-Hsi Chen
Connor Dempsey
Amritesh Sharma
Bomin Zhang
Susheng Tan
Ludovic Bellon
Sergey Frolov
Moïra Hocevar

Résumé

Sn thin films were deposited at -193°C in ultra high vacuum on InSb(110) substrates. Cryogenic cooling ensured controllable crystallinity and homogeneous thickness of thin films below15 nm. We employed different in-situ capping strategies immediately after Sn deposition to minimize likelihood of dewetting of the thin films. X-ray diffraction show how the Sn crystalline structure is influenced by the different cappings. The film is predominantly in the cubic Sn phase alpha-Sn, is epitaxial on InSb and presents very low mosaicity. However, we identified a correlation between alumina capping and the abundance of the tetragonal Sn phase (beta-Sn). Heating by the alumina e-beam source is a potential reason for the partial crystalline phase transition in the Sn layer. The presence of the beta-Sn phase caused the superconducting behavior of the films by percolation effect. Finally, this work showed that ultra-thin films of Sn on InSb substrates can be produced controllably, with perspectives for quantum computing platforms.
Fichier principal
Vignette du fichier
2301.12424.pdf (9.43 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03988148 , version 1 (02-02-2024)

Identifiants

Citer

An-Hsi Chen, Connor Dempsey, Mihir Pendharkar, Amritesh Sharma, Bomin Zhang, et al.. Role of a capping layer on the crystalline structure of Sn thin films grown at cryogenic temperatures on InSb substrates. Nanotechnology, 2023, 35 (7), pp.075702. ⟨10.1088/1361-6528/ad079e⟩. ⟨hal-03988148⟩
65 Consultations
10 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More