Spin bottleneck in resonant tunneling through double quantum dots with different Zeeman splittings.
We investigated the electron transport property of the InGaAs/GaAs double quantum dots, the electron g factors of which are different from each other. We found that in a magnetic field, the resonant tunneling is suppressed even if one of the Zeeman sublevels is aligned. This is because the other misaligned Zeeman sublevels limit the total current. A finite broadening of the misaligned sublevel partially relieves this bottleneck effect, and the maximum current is reached when interdot detuning is half the Zeeman energy difference.
Huang
S M
SM
Low Temperature Physics Laboratory, RIKEN, Wako-shi, Saitama 351-0198, Japan.
Tokura
Y
Y
Akimoto
H
H
Kono
K
K
Lin
J J
JJ
Tarucha
S
S
Ono
K
K