TY  - JOUR
AU  - Osca, Javier
AU  - Moors, Kristof
AU  - Sorée, Bart
AU  - Serra, Llorenç
TI  - Fabry–Pérot interferometry with gate-tunable 3D topological insulator nanowires
JO  - Nanotechnology
VL  - 32
IS  - 43
SN  - 1361-6528
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2021-03566
SP  - 435002 -
PY  - 2021
AB  - Three-dimensional topological insulator (3D TI) nanowires display remarkable magnetotransport properties that can be attributed to their spin-momentum-locked surface states such as quasiballistic transport and Aharonov–Bohm oscillations. Here, we focus on the transport properties of a 3D TI nanowire with a gated section that forms an electronic Fabry–Pérot (FP) interferometer that can be tuned to act as a surface-state filter or energy barrier. By tuning the carrier density and length of the gated section of the wire, the interference pattern can be controlled and the nanowire can become fully transparent for certain topological surface-state input modes while completely filtering out others. We also consider the interplay of FP interference with an external magnetic field, with which Klein tunneling can be induced, and transverse asymmetry of the gated section, e.g. due to a top-gated structure, which displays an interesting analogy with Rashba nanowires. Due to its rich conductance phenomenology, we propose a 3D TI nanowire with gated section as an ideal setup for a detailed transport-based characterization of 3D TI nanowire surface states near the Dirac point, which could be useful towards realizing 3D TI nanowire-based topological superconductivity and Majorana bound states.
LB  - PUB:(DE-HGF)16
C6  - 34284353
UR  - <Go to ISI:>//WOS:000682173800001
DO  - DOI:10.1088/1361-6528/ac1633
UR  - https://juser.fz-juelich.de/record/896741
ER  -