Spin-dependent size of interband hybridization gap: The interplay of adlayer and substrate states in Pb/Cu(111)

Wissing, S. N. P.; Ritter, Katharina T.; Krüger, Peter; Schmidt, Anke B.; Donath, M.

doi:10.1103/physrevb.91.201403

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…An alternative way to probe the surface spin structure is offered by the inverse photoemission [13,55,57,141,147,148]: the spin orientation of the incident electron beam is kept constant, and the intensity of the emitted photons is measured with varying the take-off angle. The spin signal from unoccupied states at Γ on W(1 1 0) was measured in [147] and found to change sign depending on the light observation direction.…”

Section: Spin-dependent Photocurrent From Surface Statesmentioning

confidence: 99%

Spin–orbit coupling at surfaces and 2D materials

Krasovskii

2015

J. Phys.: Condens. Matter

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Spin-orbit interaction gives rise to a splitting of surface states via the Rashba effect, and in topological insulators it leads to the existence of topological surface states. The resulting k(//) momentum separation between states with the opposite spin underlies a wide range of new phenomena at surfaces and interfaces, such as spin transfer, spin accumulation, spin-to-charge current conversion, which are interesting for fundamental science and may become the basis for a breakthrough in the spintronic technology. The present review summarizes recent theoretical and experimental efforts to reveal the microscopic structure and mechanisms of spin-orbit driven phenomena with the focus on angle and spin-resolved photoemission and scanning tunneling microscopy.

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Section: Spin-dependent Photocurrent From Surface Statesmentioning

confidence: 99%

Spin–orbit coupling at surfaces and 2D materials

Krasovskii

2015

J. Phys.: Condens. Matter

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“…[5] By means of evaporating heavy atoms onto the noble metal surfaces, the 2D binary Rashba alloys can be successfully prepared, for examples, Pb, Bi and Sb grown on Ag(111) and Cu(111). [6][7][8][9][10][11][12][13][14] With an amount of 1/3 monolayer (ML) Bi on Ag(111), the gigantic Rashba spin-splitting characterized by the Rashba parameter α R of 3.05 has been reported on BiAg 2 alloy with √3 × √3𝑅30 0 superstructure. [7,15] Due to considerable in-plane potential gradient from each Bi atom surrounded by six Ag atoms in √3 × √3𝑅30 0 lattice arrangement, BiAg 2 surface alloy also exhibits substantial out-of-plane spin polarization in addition to the spinmomentum locking of in-plane components.…”

Section: Introductionmentioning

confidence: 99%

“…With sizeable spin-orbit coupling and broken inversion symmetry, the spin degeneracy of the electronic band structure can be intrinsically lifted in two-dimensional (2D) systems to create a Rashba spin splitting of surface states [11][12][13][14] . In recent years, a class of single-atomic-layer surface alloys has been successfully fabricated by means of evaporating heavy atoms onto the noble metal surfaces, for example, Pb, Bi, and Sb grown on Ag(111) and Cu(111) [15][16][17][18][19][20][21][22][23] . The gigantic Rashba spin splitting characterized by the Rashba parameter α R of 3.05 has been reported for the ffiffi ffi 3 p ffiffi ffi 3 p R30 0 BiAg 2 binary alloy 16,24 .…”

mentioning

confidence: 99%

Orbital-enhanced warping effect in px,py-derived Rashba spin splitting of monatomic bismuth surface alloy

et al. 2020

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Spin-split Rashba bands have been exploited to efficiently control the spin degree of freedom of moving electrons, which possesses a great potential in frontier applications of designing spintronic devices and processing spin-based information. Given an intrinsic breaking of inversion symmetry and sizeable spin–orbit interaction, two-dimensional (2D) surface alloys formed by heavy metal elements exhibit a pronounced Rashba-type spin splitting of the surface states. Here, we have revealed the essential role of atomic orbital symmetry in the hexagonally warped Rashba spin-split surface state of the $$\sqrt 3 \times \sqrt 3 R30^0$$ 3 × 3 R 3 0 0 BiCu2 monatomic alloy by scanning tunneling spectroscopy (STS) and density functional theory (DFT). From dI/dU spectra and calculated band structures, three hole-like Rashba-split bands hybridized from distinct orbital symmetries have been identified in the unoccupied energy region. Because of the hexagonally deformed Fermi surface, quasi-particle interference (QPI) mappings have resolved scattering channels opened from interband transitions of px,py (mj = 1/2) band. In contrast to the s,pz-derived band, the hexagonal warping is predominately accompanied by substantial out-of-plane spin polarization Sz up to 24% in the dispersion of px,py (mj = 1/2) band with an in-plane orbital symmetry.

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