Spin current

Recently, a spin-polarised electron current have been accumulating great interest as a fundamental property for a future spintronic device application. In particular, either a spin-polarised electron current or population imbalance of spin-polarised electrons (spin current) can be accumulated in non-magnetic metal or semiconductor by flowing a electron-charge current across the interface. Such a spin-polarized current or a spin current can then transfer their spin polarisation to an attached ferromagnet through spin torque, and can also be controlled by an external field application. Such spin manipulation (spin accumulation, transfer and operation) enables us to fabricate a spin transistor.

For further reading

  • Review on spin transport: M. Johnson, Proc. IEEE 91, 652 (2003).
  • Reviews on a spin current: H. X. Tang et al., "Spin injection and transport in micro-and nanoscale devices," in "Semiconductor Spintronics and Quantum Computation" D. D. Awshalom et al. (Eds.) (Springer, Berlin, 2001), p. 31-92.

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