Few electron double quantum dots in InAs/InP nanowire heterostructures.
We report on fabrication of double quantum dots in catalytically grown InAs/InP nanowire heterostructures. In the few-electron regime, starting with both dots empty, our low-temperature transport measurements reveal a clear shell structure for sequential charging of the larger of the two dots with up to 12 electrons. The resonant current through the double dot is found to depend on the orbital coupling between states of different radial symmetry. The charging energies are well described by a capacitance model if next-neighbor capacitances are taken into account.
Fuhrer
Andreas
A
The Nanometer Structure Consortium, Lund University, Box 118, S-221 00 Lund, Sweden. Andreas.Fuhrer@ftf.lth.se
Fröberg
Linus E
LE
Pedersen
Jonas Nyvold
JN
Larsson
Magnus W
MW
Wacker
Andreas
A
Pistol
Mats-Erik
ME
Samuelson
Lars
L