TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.2.069
TI  - InP/GaSb core-shell nanowires: A novel hole-based platform with strong spin-orbit coupling for full-shell hybrid devices
PY  - 2025/02/25
UR  - https://scipost.org/SciPostPhys.18.2.069
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 2
SP  - 069
A1  - Vezzosi, Andrea
AU  - Payá, Carlos
AU  - Wójcik, Paweł
AU  - Bertoni, Andrea
AU  - Goldoni, Guido
AU  - Prada, Elsa
AU  - D. Escribano, Samuel
AB  - Full-shell hybrid nanowires (NWs), structures comprising a superconductor shell that encapsulates a semiconductor (SM) core, have attracted considerable attention in the search for Majorana zero modes (MZMs). However, the predicted Rashba spin-orbit coupling (SOC) in the SM is too small to achieve substantial topological minigaps. In addition, the SM wavefunction spreads all across the section of the nanowire, leading typically to a finite background of trivial subgap states with which MZMs may coexist. To overcome both problems, we explore the advantages of utilizing core-shell hole-band NWs as the SM part of a full-shell hybrid, with an insulating core and an active SM shell. In particular, we consider InP/GaSb core-shell NWs, which allow to exploit the unique characteristics of the III-V compound SM valence bands. We demonstrate that they exhibit a robust hole SOC that emerges from the combination of the intrinsic spin-orbit interaction of the SM active shell and the confinement effects of the nanostructure, thus depending mainly on SM and geometrical parameters. In other words, the SOC is intrinsic and does not rely on red electric fields, which are non-tunable in a full-shell hybrid geometry. As a result, core-shell SM hole-band NWs are found to be a promising candidate to explore Majorana physics in full-hell hybrid devices, addressing several challenges in the field.
ER  -

@Article{10.21468/SciPostPhys.18.2.069,
	title={{InP/GaSb core-shell nanowires: A novel hole-based platform with strong spin-orbit coupling for full-shell hybrid devices}},
	author={Andrea Vezzosi and Carlos Payá and Paweł Wójcik and Andrea Bertoni and Guido Goldoni and Elsa Prada and Samuel D. Escribano},
	journal={SciPost Phys.},
	volume={18},
	pages={069},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.2.069},
	url={https://scipost.org/10.21468/SciPostPhys.18.2.069},
}