Hostname: page-component-7c8c6479df-5xszh Total loading time: 0 Render date: 2024-03-29T02:27:47.900Z Has data issue: false hasContentIssue false

Proposal of a Novel Spin Filter Realized in a Triple Barrier Resonant Tunnel Diode using Rashba Spin-Orbit Interaction

Published online by Cambridge University Press:  17 March 2011

Takaaki Koga
Affiliation:
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198, JAPAN
Junsaku Nitta
Affiliation:
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198, JAPAN
Supriyo Datta
Affiliation:
School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN47907, USA
Hideaki Takayanagi
Affiliation:
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198, JAPAN
Get access

Abstract

A spin rectifying diode, which utilizes Rashba spin-orbit coupling, is proposed using semiconducting triple barrier structures. This spin diode makes use of spin-dependent resonant tunneling levels that are formed in the triple barrier structures. We found that, for a certain emitter-collector bias voltage, it is possible to engineer the structure in such a way that a resonant l evel formed within the first quantum well matches that of the second quantum well only for a selected spin state, thus realizing an electronic spin rectifier. The calculated spin polarization of the transmitted current through the device, which is defined as I–I/(I+I), is found to be higher than 99.9%.

Type
Research Article
Copyright
Copyright © Materials Research Society 2002

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Prinz, G. A., Physics Today, April, 58 (1995); G. A. Prinz, Science 282, 1660 (1998).Google Scholar
2. Hammar, P. R., Bennett, B. R., Yang, M. J., and Johnson, M., Phys. Rev. Lett. 83, 203 (1999).Google Scholar
3. Hu, C.-M., Nitta, J., Jensen, A., Hansen, J. B., and Takayanagi, H., Phys. Rev. B 63, 12533 (2001).Google Scholar
4. Zhu, H. J., Ramsteiner, M., Kostial, H., Wassermeier, M., Schönherr, H.-P., and Ploog, K. H., Phys. Rev. Lett. 87, 16601 (2001).Google Scholar
5. Fiederling, R., Keim, M., Reuscher, G., Ossau, W., Schmidt, G., Waag, A., and Molenkamp, L. W., Nature 402, 787 (1999).Google Scholar
6. Ohno, Y., Young, D. K., B. Beschoten, Matsukura, F., Ohno, H., and Awschalom, D. D., Nature 402, 790 (1999).Google Scholar
7. Weinmann, D., Häusler, W., and Kramer, B., Phys. Rev. Lett. 74, 984 (1995).Google Scholar
8. Recher, P., Sukhorukov, E. V., and Loss, D., Phys. Rev. Lett. 85, 1962 (2000).Google Scholar
9. Chitta, V. A., Maialle, M. Z., Leão, S. A., and Degani, M. H., Appl. Phys. Lett. 74, 2845 (1999).Google Scholar
10. Gruber, T., Keim, M., Fiederling, R., Reuscher, G., Ossau, W., Schmidt, G., Molenkamp, L. W., and Waag, A., Appl. Phys. Lett. 78, 1101 (2001).Google Scholar
11. Voskoboynikov, A., Lin, S. S., and Lee, C. P., Phys. Rev. B 59, 12514 (1999).Google Scholar
12. Voskoboynikov, A., Lin, S. S., Lee, C. P., and Tretyak, O., J. Appl. Phys. 87, 387 (2000).Google Scholar
13. Rashba, E. I., Sov. Phys. Solid State 2, 1109 (1960), [Fiz. Tverd. Tela (Leningrad) 2, 1224 (1960)]; Y. A. Bychkov and E. I. Rashba, J. Phys. C 17, 6039 (1984).Google Scholar
14. Engels, G., Lange, J., Schäpers, T., and Lüth, H., Phys. Rev. B 55, R1958 (1997).Google Scholar
15. Schäpers, Th., Engels, G., Lange, J., Klocke, T., Hollfelder, M., and Lüth, H., J. Appl. Phys. 83, 4324 (1998).Google Scholar
16. Koga, T., Nitta, J., Takayanagi, H., and Datta, S., unpublished (2001).Google Scholar
17. Koga, T., Nitta, J., Akazaki, T., and Takayanagi, H., Jpn. J. Appl. Phys., Aprilissue (2002).Google Scholar
18. Mizuta, H. and Tanoue, T., The Physics and Application of Resonant Tunnelling Diode (Cambridge University Press, New York, 1995).Google Scholar
19. Ando, Y. and Itoh, T., J. Appl. Phys. 61, 1497 (1987).Google Scholar