Current-phase relation of a short multi-mode Bi2 Se3 topological insulator nanoribbon Josephson junction with ballistic transport modes
Artikel i vetenskaplig tidskrift, 2023
We used the asymmetric superconducting quantum interference device (SQUID) technique to extract the current phase relation (CPR) of a Josephson junction with a 3D-topological insulator (3D-TI) Bi2Se3 nanobelt as the barrier. The obtained CPR shows deviations from the standard sinusoidal CPR with a pronounced forward skewness. At temperatures below 200 mK, the junction skewness values are above the zero temperature limit for short diffusive junctions. Fitting of the extracted CPR shows that most of the supercurrent is carried by ballistic topological surface states (TSSs), with a small contribution of diffusive channels primarily due to the bulk. These findings are instrumental in engineering devices that can fully exploit the properties of the topologically protected surface states of 3D TIs.
topological insulator
Josephson junction
SQUID
current phase relation
Författare
Ananthu Pullukattuthara Surendran
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Domenico Montemurro
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Universita degli Studi di Napoli Federico II
Gunta Kunakova
Latvijas Universitate
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Xavier Palermo
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Kiryl Niherysh
Latvijas Universitate
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Edoardo Trabaldo
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Dmitry Golubev
Aalto-Yliopisto
J. Andzane
Latvijas Universitate
Donats Érts
Latvijas Universitate
Floriana Lombardi
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Thilo Bauch
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Superconductor Science and Technology
0953-2048 (ISSN) 1361-6668 (eISSN)
Vol. 36 6 064003High Frequency Topological Insulator devices for Metrology (HiTIMe)
Europeiska kommissionen (EU) (EC/H2020/766714), 2018-02-01 -- 2022-01-31.
QUantum Electronics Science and TECHnology training (QuESTech)
Europeiska kommissionen (EU) (EC/H2020/766025), 2018-01-01 -- 2021-12-31.
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DOI
10.1088/1361-6668/accf40