Persistent Spin Helix (PSH): A Quantum Phenomenon in 1D Hybrid Semiconductors

Persistent spin helix (PSH) is a quantum phenomenon that occurs in one-dimensional hybrid semiconductors, where spin-polarized electrons rotate along an axis perpendicular to their direction of motion. This rotation is relatively slow, hence the term 'persistent'. The formation of PSH in one-dimensional hybrid semiconductors is linked to spin-orbit coupling effects.

PSH is jointly caused by spin-orbit coupling effects and the Stark effect. The Stark effect refers to the shift in electron band structure under an external electric field, while spin-orbit coupling describes the interaction between electron spin and its orbital motion. These combined effects lead to the persistent rotation of spin.

The formation of PSH is significant for fields like quantum information processing and spintronics. Since spin acts as a quantum bit, it can be used for encoding and storing information. The persistence of PSH enables spins to remain stable over a period, crucial for long-distance information transmission and storage.

In summary, Persistent spin helix is a quantum phenomenon occurring in one-dimensional hybrid semiconductors, characterizing the persistent rotation of spin-polarized electrons along an axis perpendicular to their motion. It is induced by both spin-orbit coupling effects and the Stark effect, holding significant applications in areas like quantum information processing and spintronics.