In or Out of Control? Electron Spin Polarization in Spin-Orbit-Influenced Systems

Donath, M.

doi:10.1016/b978-0-12-409547-2.14259-3

Cited by 3 publications

(1 citation statement)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Remarkably, the two oppositely spin-polarized valence band features (in the data for both K and K') show almost 100% spin polarization above background. Extrinsic spin-polarization effects caused by matrix-element effects based on orbital contributions as well as experimental parameters and geometry [50,51] can be ruled out by the following experimental finding obtained with unpolarized light: in the same experimental geometry with only the sample rotated azimuthally by φ = 60 • , we obtain completely spin-polarized features at K and K', yet with reversed sign. These observations are only possible if two conditions are met: (i) the SL film has one single orientation, thus confirming the XPD results [29], and (ii) the bands at the Brillouin-zone boundary are intrinsically spin polarized.…”

Section: Fig 1 (A)mentioning

confidence: 62%

Spin Structure of K Valleys in Single-Layer WS2 on Au(111)

et al. 2018

View full text Add to dashboard Cite

The spin structure of the valence and conduction bands at the K and K' valleys of single-layer WS2 on Au(111) is determined by spin-and angle-resolved photoemission and inverse photoemission. The bands confining the direct band gap of 1.98 eV are out-of-plane spin polarized with spin-dependent energy splittings of 417 meV in the valence band and 16 meV in the conduction band. The sequence of the spin-split bands is the same in the valence and in the conduction bands and opposite at the K and the K' high-symmetry points. The first observation explains "dark" excitons discussed in optical experiments, the latter points to coupled spin and valley physics in electron transport. The experimentally observed band dispersions are discussed along with band structure calculations for a freestanding single layer and for a single layer on Au(111).

show abstract

Section: Fig 1 (A)mentioning

confidence: 62%

Spin Structure of K Valleys in Single-Layer WS2 on Au(111)

et al. 2018

View full text Add to dashboard Cite

show abstract

Circular-polarized-light-induced spin polarization characterized for the Dirac-cone surface state at W(110) with C2v symmetry

Miyamoto

Wortelen

Okuda

et al. 2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

The C2v surface symmetry of W(110) strongly influences a spin-orbit-induced Dirac-cone-like surface state and its characterization by spin- and angle-resolved photoelectron spectroscopy. In particular, using circular polarized light, a distinctive k-dependent spin texture is observed along the direction of the surface Brillouin zone. For all spin components Px, Py, and Pz, non-zero values are detected, while the initial-state spin polarization has only a Py component due to mirror symmetry. The observed complex spin texture of the surface state is controlled by transition matrix element effects, which include orbital symmetries of the involved electron states as well as the geometry of the experimental set-up.

show abstract