Electronic structure of an ordered<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi><mml:mo>∕</mml:mo><mml:mi mathvariant="normal">Ag</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mn>111</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>surface alloy: Theory and experiment

Pacilé, D.; Ast, Christian R.; Papagno, M.; Silva, C. Da; Moreschini, Luca; Falub, M.; Seitsonen, Ari P.; Grioni, M.

doi:10.1103/physrevb.73.245429

Cited by 102 publications

(123 citation statements)

References 27 publications

Supporting

Mentioning

105

Contrasting

Order By: Relevance

“…The surface state dispersions follow basically a Ý3 × Ý3 SBZ periodicity, and the general shapes are close to those of the corresponding bands reported for other group-IV-induced surface alloys on Ag(111), i.e. Pb/Ag(111)(Ý3 × Ý3) [11] and Sn/Ag(111)(Ý3 × Ý3) [3]. Close to¯ , there are two steeply dispersing surface bands labeled S 1 and S 2 .…”

Section: B Electronic Band Structurementioning

confidence: 49%

“…However, as reported in that study, the Ge/Ag surface alloy shows an unexpected surface band split at theM points along the¯ KM line of the Ý3 × Ý3 surface Brillouin zone (SBZ). The observation of split bands at theM points clearly indicates that the Ge/Ag alloy differs substantially from the other group IV alloys (Pb/Ag [11] and Sn/Ag [3]; as well as from the alloys induced by Bi [2] or Sb [12]). As was concluded in Ref.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Broken symmetry induced band splitting in theAg2Gesurface alloy on Ag(111)

et al. 2014

View full text Add to dashboard Cite

We report a study of the atomic and electronic structures of the ordered Ag 2 Ge surface alloy containing ⅓ monolayer of Ge. Low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), and angle-resolved photoelectron spectroscopy (ARPES) data reveal a symmetry breaking of the expected Ý3 × Ý3 periodicity, which is established for other Ag 2 M alloys (M = Bi, Sb, Pb, and Sn). The deviation from a simple Ý3 × Ý3 structure manifests itself as a splitting of diffraction spots in LEED, as a striped structure with a 6× periodicity including a distortion of the local hexagonal structure in STM, and as a complex surface band structure in ARPES that is quite different from those of the other Ag 2 M alloys. These results are interesting in view of the differences in the atomic and electronic structures exhibited by different group IV elements interacting with Ag(111). Pb and Sn form Ý3 × Ý3 surface alloys on Ag(111), of which Ag 2 Pb shows a surface band structure with a clear spin-orbit split. Si and C form silicene and graphene structures, respectively, with linear band dispersions and the formation of Dirac cones as reported for graphene. The finding that Ag 2 Ge deviates from the ideal (Ý3 × Ý3) Ag 2 Sn and Ag 2 Pb surface alloys makes Ge an interesting "link" between the heavy group IV elements (Sn, Pb) and the light group IV elements (Si, C).

show abstract

Section: B Electronic Band Structurementioning

confidence: 49%

Section: Introductionmentioning

confidence: 98%

Broken symmetry induced band splitting in theAg2Gesurface alloy on Ag(111)

et al. 2014

View full text Add to dashboard Cite

show abstract

“…While actual devices are currently realized in semiconductor heterostructures [4], fundamental issues can be more easily studied in two-dimensional metallic systems involving heavy metal atoms, where spin splittings are much larger [5,6]. Very recently, a new class of material systems was identified where this effect is even further enhanced, among them the two surface alloys Bi/Ag(111)( √ 3 × √ 3)R30 • and Pb/Ag(111)( √ 3 × √ 3)R30 • [7,8], referred to as Bi/Ag(111) and Pb/Ag(111) henceforth. Due to an additional reduction of the surface symmetry caused by the ( √ 3 × √ 3)R30 • surface reconstruction and due to a slight corrugation of the surface [9], the size of the Rashba type spin-orbit induced spin splitting is about one order of magnitude larger than what is observed for the Au(111) surface state [10,11].…”

mentioning

confidence: 99%

Quantitative vectorial spin analysis in angle-resolved photoemission:Bi∕Ag(111)andPb∕
Meier
¹
,
Dil
²
,
Lobo-Checa
³

et al. 2008
Phys. Rev. B
154
15
73
1
View full text Add to dashboard Cite

The concept of vectorial spin analysis in spin and angle resolved photoemission is illustrated in this report. Two prototypical systems, Bi/Ag(111• , which show a large Rashba type spin-orbit splitting, were investigated by means of spin and angle resolved photoemission. The spin polarization vectors of individual bands are determined by a twostep fitting routine. First, the measured intensities are fitted with an appropriate number of suitable peaks to quantify the contributions of the individual bands, then the measured spin polarization curves are fitted by varying for each band the polarization direction and its magnitude. We confirm that the surface states experience a large spin splitting. Moreover, we find that all surface state bands are 100 percent spin polarized, and that for some states spin polarization vectors rotate out of the surface plane.

show abstract

“…∆ so ≃ 110 meV in Au(111), 7 that the possibility of detecting SO split image states has been recently put forward. 10 Other systems displaying giant SO splittings are surface alloys as, for example, Li/W(110), 11 Pb/Ag(111), 12,13 and Bi/Ag(111), 14 or even one-dimensional structures such as Au chains in vicinal Si(111) surfaces. 15 For such low-dimensional or structured materials, the SO interaction is of Rashba type, but large SO splittings have been found (or predicted) also in bulk crystals, where the Dresselhaus interaction leads to ∆ so as large as 200 meV in non-centrosymmetric superconductors CePt 3 Si, 16,17 Li 2 Pd 3 B, and Li 2 P7 3 B.…”

Section: Introductionmentioning

confidence: 99%

Electron-phonon effects on spin-orbit split bands of two-dimensional systems

2007

View full text Add to dashboard Cite

The electronic self-energy is studied for a two dimensional electron gas coupled to a spin-orbit Rashba field and interacting with dispersionless phonons. For the case of a momentum independent electron-phonon coupling (Holstein model) we solve numerically the self-consistent non-crossing approximation for the self-energy and calculate the electron mass enhancement m * /m and the spectral properties. We find that, even for nominal weak electron-phonon interaction, for strong spin-orbit couplings the electrons behave as effectively strongly coupled to the phonons. We interpret this result by a topological change of the Fermi surface occurring at sufficiently strong spin-orbit coupling, which induces a square-root divergence in the electronic density of states at low energies. We provide results for m * /m and for the density of states of the interacting electrons for several values of the electron filling and of the spin-orbit interaction.

show abstract

Electronic structure of an orderedPb∕Ag(111)surface alloy: Theory and experiment

Cited by 102 publications

References 27 publications

Broken symmetry induced band splitting in theAg2Gesurface alloy on Ag(111)

Broken symmetry induced band splitting in theAg2Gesurface alloy on Ag(111)

Quantitative vectorial spin analysis in angle-resolved photoemission:Bi∕Ag(111)andPb∕
Meier
¹
,
Dil
²
,
Lobo-Checa
³

et al. 2008
Phys. Rev. B
154
15
73
1
View full text Add to dashboard Cite

Electron-phonon effects on spin-orbit split bands of two-dimensional systems

Contact Info

Product

Resources

About

Electronic structure of an orderedPb∕Ag(111)surface alloy: Theory and experiment

Cited by 102 publications

References 27 publications

Broken symmetry induced band splitting in theAg2Gesurface alloy on Ag(111)

Broken symmetry induced band splitting in theAg2Gesurface alloy on Ag(111)

Quantitative vectorial spin analysis in angle-resolved photoemission:Bi∕Ag(111)andPb∕Meier1, Dil2, Lobo-Checa3 et al. 2008Phys. Rev. B15415731View full textAdd to dashboardCite

Electron-phonon effects on spin-orbit split bands of two-dimensional systems

Contact Info

Product

Resources

About

Quantitative vectorial spin analysis in angle-resolved photoemission:Bi∕Ag(111)andPb∕
Meier
¹
,
Dil
²
,
Lobo-Checa
³

et al. 2008
Phys. Rev. B
154
15
73
1
View full text Add to dashboard Cite