Application of split-gate structures as tunable spin filters

M. J. Gilbert, J. P. Bird

Research output: Contribution to journalArticlepeer-review


We describe an electron filter that exploits the known magnetotransport properties of quantum point contacts to provide local and tunable control of the spin polarization in a semiconductor. When properly configured, we show that the conductance of this device gives a direct measure of the spin polarization of carriers transmitted through it. By modeling the transport through a potential barrier with experimentally realistic parameters, we discuss the factors which must be satisfied in order to successfully implement such a device.

Original languageEnglish (US)
Pages (from-to)1050-1052
Number of pages3
JournalApplied Physics Letters
Issue number7
StatePublished - Aug 14 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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