Co1-xFexS2: Albnable source of highly spin-polarized electrons

L. Wang, K. Umemoto, R. M. Wentzcovitch, T. Y. Chen, C. L. Chien, J. G. Checkelsky, J. C. Eckert, E. D. Dahlberg, C. Leighton

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Abstract

In the emerging field of spin-electronics ideal ferromagnetic electron sources would not only possess a high degree of spin polarization, but would also offer control over the magnitude of this polarization. We demonstrate here that a simple scheme can be utilized to control both the magnitude and the sign of the spin polarization of ferromagnetic CoS2, which we probe with a variety of techniques. The position of the Fermi level is fine-tuned by solid solution alloying with the isostructural diamagnetic semiconductor FeS 2, leading to tunable spin polarization of up to 85%.

Original languageEnglish (US)
Article number056602
JournalPhysical Review Letters
Volume94
Issue number5
DOIs
StatePublished - Feb 11 2005

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Wang, L., Umemoto, K., Wentzcovitch, R. M., Chen, T. Y., Chien, C. L., Checkelsky, J. G., Eckert, J. C., Dahlberg, E. D., & Leighton, C. (2005). Co1-xFexS2: Albnable source of highly spin-polarized electrons. Physical Review Letters, 94(5), [056602]. https://doi.org/10.1103/PhysRevLett.94.056602