TY  - JOUR
AU  - Heedt, S.
AU  - Manolescu, A.
AU  - Nemnes, G. A.
AU  - Prost, W.
AU  - Schubert, J.
AU  - Grützmacher, D.
AU  - Schäpers, Th.
TI  - Adiabatic Edge Channel Transport in a Nanowire Quantum Point Contact Register
JO  - Nano letters
VL  - 16
IS  - 7
SN  - 1530-6992
CY  - Washington, DC
PB  - ACS Publ.
M1  - FZJ-2016-03922
SP  - 4569 - 4575
PY  - 2016
AB  - We report on a prototype device geometry where a number of quantum point contacts are connected in series in a single quasi-ballistic InAs nanowire. At finite magnetic field the backscattering length is increased up to the micron-scale and the quantum point contacts are connected adiabatically. Hence, several input gates can control the outcome of a ballistic logic operation. The absence of backscattering is explained in terms of selective population of spatially separated edge channels. Evidence is provided by regular Aharonov−Bohm-type conductance oscillations in transverse magnetic fields, in agreement with magnetoconductance calculations. The observation of the Shubnikov−de Haas effect at large magnetic fields corroborates the existence of spatially separated edge channels and provides a new means for nanowire characterization.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000379794200086
C6  - pmid:27347816
DO  - DOI:10.1021/acs.nanolett.6b01840
UR  - https://juser.fz-juelich.de/record/811450
ER  -