Spin Splitting of an Au(111) Surface State Band Observed with Angle Resolved Photoelectron Spectroscopy

LaShell, S.; McDougall, Brendan; Jensen, E.

doi:10.1103/physrevlett.77.3419

Cited by 1,035 publications

(878 citation statements)

References 13 publications

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“…[1][2][3] As pointed out in the pioneering work by LaShell et al, 4 the lack of inversion symmetry of surfaces allows for the spin splitting of the Shockley-type surface states via the spin-orbit interaction. Noteworthy, the order of magnitude of the energy spin splitting is as much as ∼0.1-0.5 eV, about two orders of magnitude larger than in semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Spin-flip transitions and departure from the Rashba model in the Au(111) surface

et al. 2013

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We present a detailed analysis of the spin-flip excitations induced by a periodic time-dependent electric field in the Rashba prototype Au(111) noble metal surface. Our calculations incorporate the full spinor structure of the spin-split surface states and employ a Wannier-based scheme for the spin-flip matrix elements. We find that the spin-flip excitations associated with the surface states exhibit an strong dependence on the electron momentum magnitude, a feature that is absent in the standard Rashba model [E. I. Rashba, Sov. Phys. Solid State 2, 1109 (1960)]. Furthermore, we demonstrate that the maximum of the calculated spin-flip absorption rate is about twice the model prediction. These results show that, although the Rashba model accurately describes the spectrum and spin polarization, it does not fully account for the dynamical properties of the surface states.

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Section: Introductionmentioning

confidence: 99%

Spin-flip transitions and departure from the Rashba model in the Au(111) surface

et al. 2013

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“…Noble metal (e.g., Au 6 , Ag 7 , and Ir 8 ) and sp-orbit heavy-metal surfaces (e.g., Bi 9 , Sb 10 and Pb 11 ) were shown to have large spin splitting. Heavy metal adatoms alloying with metal (e.g., Bi/Ag(111) 12 ) and/or semiconductor surfaces (e.g., Bi/Si(111) 13 ) were found to possess giant spin splitting.…”

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Formation of Ideal Rashba States on Layered Semiconductor Surfaces Steered by Strain Engineering

et al. 2015

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ABSTACT: Spin splitting of Rashba states in two-dimensional electron system provides a promising mechanism of spin manipulation for spintronics applications. However, Rashba states realized experimentally to date are often outnumbered by spin-degenerated substrate states at the same energy range, hindering their practical applications. Here, by density functional theory calculation, we show that Au one monolayer film deposition on a layered semiconductor surface β-InSe(0001) can possess "ideal" Rashba states with large spin splitting, which are completely situated inside the large band gap of the substrate. The position of the Rashba bands can be tuned over a wide range with respect to the substrate band edges by experimentally accessible strain. Furthermore, our nonequilibrium Green's function transport calculation shows that this system may give rise to the long-sought strong current modulation when made into a device of Datta-Das transistor. Similar systems may be identified with other metal ultrathin films and layered semiconductor substrates to realize ideal Rashba states.

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“…Here, the spin-orbit interaction takes over the role of an external magnetic field or the exchange field. An ARPES study of a surface state on Au(111) by LaShell et al [8] initiated this topic when they found an energy splitting proportional to the electron momentum, which they correctly interpreted as being due to the Rashba effect [9], which was hitherto known only in semiconductor physics. Experimental confirmation of the spin polarized and non-degenerate character came a few years later by Hoesch et al [10] from spin-polarized ARPES (SARPES) data, which showed also the helical nature of the spin structure in these bands.…”

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Can spin-polarized photoemission measure spin properties in condensed matter?

Osterwalder¹

2012

J. Phys.: Condens. Matter

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Photoemitted electrons move in a vacuum; their quantum state can be completely characterized in terms of energy, momentum and spin polarization by spin-polarized photoemission experiments. A review article in this issue by Heinzmann and Dil (2012 J. Phys.: Condens. Matter 24 173001) considers whether the measured spin properties, i.e. the magnitude and direction of the spin polarization vector, can be traced back to the quantum state from which these electrons originate. The careful conclusion is that they can, which is highly relevant in view of the current interest in these experiments and their application to topological insulators, where the spin-orbit interaction produces spin-polarized surface states.

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Spin Splitting of an Au(111) Surface State Band Observed with Angle Resolved Photoelectron Spectroscopy

Cited by 1,035 publications

References 13 publications

Spin-flip transitions and departure from the Rashba model in the Au(111) surface

Spin-flip transitions and departure from the Rashba model in the Au(111) surface

Formation of Ideal Rashba States on Layered Semiconductor Surfaces Steered by Strain Engineering

Can spin-polarized photoemission measure spin properties in condensed matter?

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