Dresselhaustyyppinen

Dresselhaustyyppinen is a term used in theoretical and experimental condensed matter physics to refer to phenomena governed by Dresselhaus-type spin-orbit interaction. The term is a Finnish coinage, combining the surname Dresselhaus with the suffix -tyyppinen meaning "of the type" or "type." The more common written form in Finnish literature is Dresselhaus-tyyppinen, but Dresselhaustyyppinen appears in some texts as a variant spelling.

Origins and context: The concept derives from the Dresselhaus effect, named after Gene Dresselhaus, who described spin-orbit coupling in crystals lacking bulk inversion symmetry. Dresselhaustyyppinen describes systems where the Dresselhaus-type coupling dominates the spin splitting of electronic states, as opposed to Rashba-type coupling arising from structure inversion asymmetry.

Characteristics: In bulk zinc-blende crystals and quantum wells with low symmetry, the Dresselhaus interaction leads to an anisotropic spin splitting in k-space, described by a k-dependent Hamiltonian H_D ~ gamma [k_x (k_y^2 - k_z^2), k_y (k_z^2 - k_x^2), k_z (k_x^2 - k_y^2)]. The resulting spin textures influence spin relaxation times via mechanisms such as D’yakonov–Perel’.

Occurrence and applications: Dresselhaustyyppinen is used when modeling materials like GaAs, InAs, or related semiconductors and their heterostructures, where bulk inversion asymmetry is significant. It is relevant for spintronic devices, quantum information experiments, and interpretation of spin transport measurements.

See also: Dresselhaus effect, Rashba effect, spin-orbit coupling, spintronics.