Home | About Journal | Web Links | E-mail Alerts | RSS RSS Icon | Browse

Emerging nonequilibrium bound state in spin-current–local-spin scattering

Source: Phys. Rev. B 80, 104434 (2009); doi:10.1103/PhysRevB.80.104434

Published 25 September 2009

KEYWORDS and PACS
Keywords
PACS
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 72.25.Ba
    Spin polarized transport in metals
  • 75.10.Jm
    Quantized spin models (magnetism)
  • YEAR: 2009
RELATED DATABASES

To view database links for this article,
you need to log in.
To view database links for this article,
you need to log in.
PUBLICATION DATA
Publisher:
AIP is a member of CrossRef APS
Fatih Doğan,1 Lucian Covaci,1,2 Wonkee Kim,1,3 and Frank Marsiglio1
1Department of Physics, University of Alberta, Edmonton, Canada T6G 2J1
2Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada V6T 1Z1
3Department of Physics, University of Houston, Houston, Texas 77004, USA
Magnetization reversal is a well-studied problem with obvious applicability in computer hard drives. One can accomplish a magnetization reversal in at least one of two ways: application of a magnetic field or through a spin current. The latter is more amenable to a fully quantum-mechanical analysis. We formulate and solve the problem whereby a spin current interacts with a ferromagnetic Heisenberg spin chain, to eventually reverse the magnetization of the chain. Spin flips are accomplished through both elastic and inelastic scattering. A consequence of the inelastic-scattering channel, when it is no longer energetically possible, is the occurrence of a nonequilibrium bound state, which is an emergent property of the coupled local plus itinerant spin system. For certain definite parameter values the itinerant spin lingers near the local spins for some time, before eventually leaking out as an outwardly diffusing state. This phenomenon results in spin-flip dynamics and filtering properties for this type of system. ©2009 The American Physical Society
History: Received 29 May 2009; revised 12 August 2009; published 25 September 2009
Permalink: http://link.aps.org/abstract/PRB/v80/e104434

REFERENCES (36)

For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.
  1. L. Berger, Phys. Rev. B 54, 9353 (1996).
  2. M. Tsoi, A. G. M. Jansen, J. Bass, W.-C. Chiang, M. Seck, V. Tsoi, and P. Wyder, Phys. Rev. Lett. 80, 4281 (1998)
  3. T. Balashov, A. F. Takacs, M. Dane, A. Ernst, P. Bruno, and W. Wulfhekel, Phys. Rev. B 78, 174404 (2008).
  4. S. Mangin, Y. Henry, D. Ravelosona, J. A. Katine, and E. E. Fullerton, Appl. Phys. Lett. 94, 012502 (2009).
  5. L. Liu, T. Moriyama, D. C. Ralph, and R. A. Buhrman, Appl. Phys. Lett. 94, 122508 (2009).
  6. G. Finocchio, O. Ozatay, L. Torres, R. A. Buhrman, D. C. Ralph, and B. Azzerboni, Phys. Rev. B 78, 174408 (2008).
  7. J. P. Strachan, V. Chembrolu, Y. Acremann, X. W. Yu, A. A. Tulapurkar, T. Tyliszczak, J. A. Katine, M. J. Carey, M. R. Scheinfein, H. C. Siegmann, and J. Stohr, Phys. Rev. Lett. 100, 247201 (2008).
  8. Y. B. Bazaliy, B. A. Jones, and S.-C. Zhang, Phys. Rev. B 57, R3213 (1998).
  9. W. Kim and F. Marsiglio, Phys. Rev. B 69, 212406 (2004).
  10. A. Brataas, Gergely Zaránd, Yaroslav Tserkovnyak, and Gerrit E. W. Bauer, Phys. Rev. Lett. 91, 166601 (2003).
  11. X. J. Wang, H. Zou, and Y. Ji, Appl. Phys. Lett. 93, 162501 (2008).
  12. Y. Avishai and Y. Tokura, Phys. Rev. Lett. 87, 197203 (2001).
  13. F. Doğan, W. Kim, C. M. Blois, and F. Marsiglio, Phys. Rev. B 77, 195107 (2008).
  14. F. Ciccarello, M. Paternostro, M. S. Kim, and G. M. Palma, Phys. Rev. Lett. 100, 150501 (2008).
  15. W. Kim, L. Covaci, and F. Marsiglio, Phys. Rev. B 74, 205120 (2006).
  16. R. S. Dumont, S. Jain, and A. Bain, J. Chem. Phys. 106, 5928 (1997).
ADVERTISEMENT