Enhanced Zeeman splitting in Ga0.25In0.75As quantum point contacts
Författare
Summary, in English
The strength of the Zeeman splitting induced by an applied magnetic field is an important factor for the realization of spin-resolved transport in mesoscopic devices. We measure the Zeeman splitting for a quantum point contact etched into a Ga0.25In0.75As quantum well, with the field oriented parallel to the transport direction. We observe an enhancement of the Lande g-factor from vertical bar g*vertical bar=3.8 +/- 0.2 for the third subband to vertical bar g*vertical bar=5.8 +/- 0.6 for the first subband, six times larger than in GaAs. We report subband spacings in excess of 10 meV, which facilitates quantum transport at higher temperatures. (C) 2008 American Institute of Physics.
Avdelning/ar
Publiceringsår
2008
Språk
Engelska
Publikation/Tidskrift/Serie
Applied Physics Letters
Volym
93
Issue
1
Dokumenttyp
Artikel i tidskrift
Förlag
American Institute of Physics (AIP)
Ämne
- Condensed Matter Physics
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0003-6951