Rotatable spin-polarized electron source for inverse-photoemission experiments

Stolwijk, Sebastian D.; Wortelen, H.; Schmidt, Anke B.; Donath, M.

doi:10.1063/1.4863097

Cited by 26 publications

(17 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, the experiment simultaneously probes the out-of-plane and in-plane ⊥ spin-polarization direction with respect toMK (MK ) (see Ref. [21]). To discern whether the out-of-plane or the in-plane ⊥ spin polarization is dominant, measurements are conducted alongMK at two distinct points in k space.…”

Section: A Experimental Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Spin texture with a twist in momentum space for Tl/Si(111)

et al. 2015

View full text Add to dashboard Cite

The electronic structure and spin texture around theM point of Tl/Si(111)-(1 × 1) is investigated with spinand angle-resolved inverse photoemission and density-functional theory. The Tl/Si(111)-(1 × 1) surface exhibits a surface-derived unoccupied state, which extends over the complete surface Brillouin zone. It is known for its giant spin-orbit-induced splitting and unique symmetry-and spin-orbit-induced spin landscape: a rotating spin pattern in momentum space along¯ K and pure in-plane spin polarization along¯ M . Our results demonstrate how theM point is encircled by this state. Its spin texture shows a peculiar twist, which reflects the C 1h symmetry of theM point.

show abstract

Section: A Experimental Resultsmentioning

confidence: 99%

“…A detailed description can be found in Ref. [21]. TheMK (MK ) direction is accessed in two ways: (i) SR-IPE measurements along¯ KM (¯ K M ) give direct access to theMK (MK ) direction, if continued beyond theK (K ) point.…”

Section: Methodsmentioning

confidence: 99%

Spin texture with a twist in momentum space for Tl/Si(111)

et al. 2015

View full text Add to dashboard Cite

show abstract

“…A detailed description of the SR-IPE experiment with the ROSE is presented in Ref. [20]. The experiment allows a measurement of the unoccupied electronic structure with sensitivity to all three spin-polarization directions.…”

mentioning

confidence: 99%

“…The SR-IPE experiment probes the in-plane ⊥ spin-polarization direction (red up-and blue down-pointing triangles). The noncomplete spin polarization of the electron beam has been accounted for by the usual normalization to a 100% effective beam polarization, in this case to the in-plane ⊥ component [20]. Figure 3(a) displays the corresponding E(k ) plot obtained from a peak analysis of spectra, not all of which are shown in Fig.…”

mentioning

confidence: 99%

Thin line of a Rashba-type spin texture: Unoccupied surface resonance of Tl/Si(111) alongΓ¯M¯

et al. 2014

View full text Add to dashboard Cite

The Tl/Si(111)-(1 × 1) surface features outstanding properties with a unique spin pattern in momentum space. Along¯ K (¯ K ), surface states with rotating spin had been observed. Here, the focus is put on the unoccupied surface electronic structure along the¯ M high-symmetry direction. Spin-and angle-resolved inversephotoemission experiments with sensitivity to the in-plane and out-of-plane components of the spin-polarization vector are conducted with the help of our recently developed rotatable spin-polarized electron source (ROSE). In agreement with our theoretical findings, we identify a surface resonance with giant spin-orbit-induced spin splitting, which exhibits an exclusive Rashba-type spin texture, i.e., a pure in-plane spin polarization perpendicular to¯ M , in compliance with the mirror-plane symmetry of the¯ M direction. Notably, for slight deviations from the high-symmetry line, this constraint is lifted and additional spin-polarization components emerge. This highlights the importance of a correct alignment of the experiment when investigating samples with spin textures that are more complex than in simple Rashba systems or in ferromagnets.

show abstract

“…For this purpose we used spin-and angle-resolved inverse photoemission (IPE). The spindependent unoccupied electronic structure of Ta (110) was investigated by utilizing a spin-polarized electron beam [41] and measuring the Rashba component of the spin polarization. The emitted photons with an energy of 9.9 eV are detected by Geiger-Müller counters.…”

mentioning

confidence: 99%

Existence of topological nontrivial surface states in strained transition metals: W, Ta, Mo, and Nb

et al. 2016

View full text Add to dashboard Cite

In a joint theoretical and experimental investigation we show that a series of transition metals with strained body-centered cubic lattice-W, Ta, Nb, and Mo-host surface states that are topologically protected by mirror symmetry. Our finding extends the class of topologically nontrivial systems by topological crystalline transition metals. The investigation is based on independent calculations of the electronic structures and of topological invariants, the results of which agree with established properties of the Dirac-type surface state in W(110). To further support our prediction, we investigate both experimentally by spin-resolved inverse photoemission and theoretically an unoccupied topologically nontrivial surface state in Ta(110).

show abstract

Rotatable spin-polarized electron source for inverse-photoemission experiments

Cited by 26 publications

References 37 publications

Spin texture with a twist in momentum space for Tl/Si(111)

Spin texture with a twist in momentum space for Tl/Si(111)

Thin line of a Rashba-type spin texture: Unoccupied surface resonance of Tl/Si(111) alongΓ¯M¯

Existence of topological nontrivial surface states in strained transition metals: W, Ta, Mo, and Nb

Contact Info

Product

Resources

About