Spin-Orbit-Induced Spin Textures of Unoccupied Surface States on Tl/Si(111)

Beschreibung

This thesis describes the construction of a rotatable spin-polarized electron source and its use in spin- and angle-resolved inverse photoemission to investigate the unoccupied electron states of Tl/Si(111)-(1x1) with special emphasis on their spin texture. Towards more efficient electronics - with the electron spin as information carrier: This motto is the motivation for numerous studies in solid state physics that deal with electron states whose spin degeneracy is lifted by spin-orbit interaction. This thesis addresses the spin-orbit-induced spin textures in momentum space in the surface electronic structure of a prototypical Rashba-type hybrid system: heavy metal thallium on semiconducting silicon. For Tl/Si(111)-(1x1), the thallium adlayer provides surface states with strong spin-orbit interaction and peculiar spin-orbit-induced spin textures: spin rotations and spin chirality in momentum space for unoccupied surface states with giant spin splittings. Almost completely out-of-plane spin-polarized valleys in the vicinity of the Fermi level are identified. As the valley polarization is oppositely oriented at specific points in momentum space, backscattering should be strongly suppressed in this system.
This thesis describes the construction of a rotatable spin-polarized electron source and its use in spin- and angle-resolved inverse photoemission to investigate the unoccupied electron states of Tl/Si(111)-(1x1) with special emphasis on their spin texture. Towards more efficient electronics - with the electron spin as information carrier: This motto is the motivation for numerous studies in solid state physics that deal with electron states whose spin degeneracy is lifted by spin-orbit interaction. This thesis addresses the spin-orbit-induced spin textures in momentum space in the surface electronic structure of a prototypical Rashba-type hybrid system: heavy metal thallium on semiconducting silicon. For Tl/Si(111)-(1x1), the thallium adlayer provides surface states with strong spin-orbit interaction and peculiar spin-orbit-induced spin textures: spin rotations and spin chirality in momentum space for unoccupied surface states with giant spin splittings. Almost completely out-of-plane spin-polarized valleys in the vicinity of the Fermi level are identified. As the valley polarization is oppositely oriented at specific points in momentum space, backscattering should be strongly suppressed in this system.
Nominated as an outstanding PhD thesis by Muenster University, Germany Provides a unique design for an electron source with variable spin-polarization direction Discusses metallic surface states with giant spin splitting and exceptional spin texture on a semiconductor surface Deals with spin-polarized valleys at the Fermi level with promising impacts for spintronic applications Includes supplementary material: sn.pub/extras

Autor*in

Sebastian David Stolwijk

Themen in »Spin-Orbit-Induced Spin Textures of Unoccupied Surface States on Tl/Si(111)«

Low-dimensional systems Rashba effect Rashba systems Rotatable spin-polarized electron source Semiconducting silicon Spin Textures on Tl/Si(111)-(1×1) Spin phenomena Spin-orbit interaction Spin-polarized electrons Spin-resolved inverse photoemission

Stimmen zu »Spin-Orbit-Induced Spin Textures of Unoccupied Surface States on Tl/Si(111)«

Details

Link teilen