Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Y42: Topological Crystalline Insulators
8:00 AM–11:00 AM,
Friday, March 10, 2023
Room: Room 318
Sponsoring
Unit:
DMP
Chair: Sayed Ghorashi, Stony Brook University
Abstract: Y42.00005 : Weak antilocalization in selective-area grown Pb1-xSnxTe nanowire networks*
9:12 AM–9:24 AM
Presenter:
Maarten Kamphuis
(University of Twente)
Authors:
Maarten Kamphuis
(University of Twente)
Femke Witmans
(University of Twente)
Joost Ridderbos
(University of Twente)
Jonas Kareem
(University of Twente)
Sander G Schellingerhout
(Eindhoven University of Technology)
Chuan Li
(University of Twente)
Erik P. A. M. Bakkers
(Eindhoven University of Technology)
Floris Zwanenburg
(Univ of Twente)
Alexander Brinkman
(University of Twente)
Hybrid TCI/superconductor nanowire networks are of interest for applications in quantum computation, as these are predicted to host non-abelian quasiparticles, such as Majorana fermions or parafermions [4]. Towards this goal, we use a pre-patterned SiNx mask on a InP(111) substrate for selective area growth of Pb1-xSnxTe by molecular beam epitaxy [5], and define Hall bar devices with side gates that allow for simultaneous Hall and field-effect measurements.
By investigating the low-temperature (magneto-)transport properties, a Hall mobility (135 cm2/Vs) and carrier density (4.7·1020 cm-3, similar to [2]) are obtained for pure SnTe nanowires. Moreover, a cusp is observed in the magnetoresistance which we attribute to weak antilocalization; hinting at a contribution of the surface states to the overall transport, despite the high bulk conductivity.
[1] Hsieh, T., et al. Nat Commun 3, 982 (2012)
[2] Volobuev V.V., et al. Adv. Mat. 23, 3, 1604185 (2016)
[3] Safdar, M., Wang, Q., et al. Nano Lett. 15, 2485-2490 (2015)
[4] Xiao, J., Yan, B. Nat Rev Phys 3, 283–297 (2021).
[5] Jung, J. Schellingerhout, A.G. ArXiv:2209.09758v1 (2022)
*Funded by the Dutch Research Council (NWO).
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