title: Spin bottleneck in resonant tunneling through double quantum dots with different Zeeman splittings.
abstract: 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.
authors.affiliation: Low Temperature Physics Laboratory, RIKEN, Wako-shi, Saitama 351-0198, Japan.
authors.forename: S M
authors.initials: SM
authors.lastname: Huang
authors.forename: Y
authors.initials: Y
authors.lastname: Tokura
authors.forename: H
authors.initials: H
authors.lastname: Akimoto
authors.forename: K
authors.initials: K
authors.lastname: Kono
authors.forename: J J
authors.initials: JJ
authors.lastname: Lin
authors.forename: S
authors.initials: S
authors.lastname: Tarucha
authors.forename: K
authors.initials: K
authors.lastname: Ono