Toward dissipationless spin transport in semiconductors

Title Effects of spin imbalance on the electric-field-driven quantum dissipationless spin current in p-doped semiconductors

Dissipationless spin current in anisotropic p-doped semiconductors

where j j i is the current of the ith component of the spin along the direction j and eijk is the totally antisymmetric tensor in three dimensions (3D). This effect arises because of spinorbit coupling in the valence band of conventional semiconductors such as GaAs and Ge. Sinova et al.3 also found a similar effect in the electron doped conduction band. Transport equation (1) is similar to Ohm’...

Dissipationless quantum spin current at room temperature.

Although microscopic laws of physics are invariant under the reversal of the arrow of time, the transport of energy and information in most devices is an irreversible process. It is this irreversibility that leads to intrinsic dissipations in electronic devices and limits the possibility of quantum computation. We theoretically predict that the electric field can induce a substantial amount of ...

Dissipationless spin - current between Heisenberg ferromag - nets with spin - orbit coupling

– A system exhibiting multiple simultaneously broken symmetries offers the opportunity to influence physical phenomena such as tunneling currents by means of external control parameters. Time-reversal symmetry and inversion symmetry are both absent in ferromag-netic metals with substantial spin-orbit coupling. We here study transport of spin in a system consisting of two ferromagnets with spin-...

Universal intrinsic spin Hall effect.

We describe a new effect in semiconductor spintronics that leads to dissipationless spin currents in paramagnetic spin-orbit coupled systems. We argue that in a high-mobility two-dimensional electron system with substantial Rashba spin-orbit coupling, a spin current that flows perpendicular to the charge current is intrinsic. In the usual case where both spin-orbit split bands are occupied, the...