Investigation of the surface bands along the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mover accent="true"><mml:mi>X</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mtext>−</mml:mtext><mml:mover accent="true"><mml:mi>M</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:mrow></mml:math>line of the Cu(100) surface

Sekiba, Daiichiro; Komori, Fumio; Cortona, Pietro

doi:10.1103/physrevb.75.165410

Cited by 3 publications

(3 citation statements)

References 26 publications

(22 reference statements)

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“…The Cu(100) is characterized by two intense bulk projected states. 33,34 Upon Bi deposition, four Bi-induced peaks arise, namely E 2 , E 3 , E 4 , and E 5 , at 1.74 eV, 1.69 eV, 1.19 eV, and 0.97 eV of binding energy, respectively . These Bi-induced features are intense if excited by light polarized in the surface plane.…”

Section: Resultsmentioning

confidence: 99%

Orbital dependent Rashba splitting and electron-phonon coupling of 2D Bi phase on Cu(100) surface

Gargiani

Lisi

Betti

et al. 2013

The Journal of Chemical Physics

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A monolayer of bismuth deposited on the Cu(100) surface forms a highly ordered c(2×2) reconstructed phase. The low energy single particle excitations of the c(2×2) Bi/Cu(100) present Bi-induced states with a parabolic dispersion in the energy region close to the Fermi level, as observed by angle-resolved photoemission spectroscopy. The electronic state dispersion, the charge density localization, and the spin-orbit coupling have been investigated combining photoemission spectroscopy and density functional theory, unraveling a two-dimensional Bi phase with charge density well localized at the interface. The Bi-induced states present a Rashba splitting, when the charge density is strongly localized in the Bi plane. Furthermore, the temperature dependence of the spectral density close to the Fermi level has been evaluated. Dispersive electronic states offer a large number of decay channels for transitions coupled to phonons and the strength of the electron-phonon coupling for the Bi/Cu(100) system is shown to be stronger than for Bi surfaces and to depend on the electronic state symmetry and localization.

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Section: Resultsmentioning

confidence: 99%

Orbital dependent Rashba splitting and electron-phonon coupling of 2D Bi phase on Cu(100) surface

Gargiani

Lisi

Betti

et al. 2013

The Journal of Chemical Physics

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“…In this letter we present the results of density functional theory (DFT) calculations on the p(2×4) glycinate monolayer and show that the origin of the anisotropic free-electron-like state (AFES) is a Cu Shockley surface state (SS). Although Kanazawa et al did not observe a SS near the Fermi energy on the bare Cu (100) surface [1] a SS has been identified near the Fermi energy at the surface Brillouin zone (SBZ) boundary [4,5,6,7]. We show that the SS is folded back to the Γ point in the (SBZ) for the p(2×4) structure studied by Kanazawa et al, and that the anisotropic parabolic dispersion of the observed AFES is due to enhanced tunneling into the SS, mediated by the lowest unoccupied molecular orbitals of the glycinate ions.…”

mentioning

confidence: 96%

“…In this communication we present the results of density functional theory (DFT) calculations on the p(2 × 4) glycinate monolayer and show that the origin of the AFES is a copper Shockley surface state (SS). Although Kanazawa et al did not observe a SS near the Fermi energy on the bare Cu(100) surface [5] a SS has been identified near the Fermi energy at the surface Brillouin zone (SBZ) boundary [6][7][8][9]. We show that the observation of a AFES is due to enhanced tunnelling into the SS, mediated by the lowest unoccupied molecular orbitals of the glycinate ions and by the backfolding of the SS to the ¯ point in the SBZ for the p(2 × 4) structure.…”

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The nature of highly anisotropic free-electron-like states in a glycinate monolayer on Cu(100)

Dyer¹,

Persson²

2008

J. Phys.: Condens. Matter

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The free-electron-like state observed in a scanning tunneling spectroscopy study of a chiral p(2×4) monolayer of glycinate ions on the Cu(100) surface [K. Kanazawa et al, J. Am. Chem. Soc. 2007, 129, 740] is shown from density functional theory calculations to originate from a Cu Shockley surface state at the surface Brillouin zone boundary of the clean surface with highly anisotropic dispersion. The presence of the glycinate ions on the surface causes a dramatically enhanced tunneling into this surface state that is otherwise not observed in tunneling on the bare surface.PACS numbers: 68.37. Ef, 68.43.bc, 73.20.At Recently, free-electron-like states arising in layers of organic molecules on metal surfaces at energies close to the Fermi energy have been observed by scanning tunneling and photoemission spectroscopies [1,2,3]. Interest in such delocalized electronic states is high, because of their potential use in molecular electronics applications. In systems where the molecule is more or less physisorbed the observed free-electron like state was simply identified as a metal surface state [3], whereas in systems where the molecule is chemisorbed the origin of the state is not properly understood [1,2].

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Bi ordered phases on Cu(100): Periodic arrays of dislocations influence the electronic properties

Gargiani

Izzo

Bussolotti

et al. 2010

The Journal of Chemical Physics

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A single layer of bismuth deposited on the Cu(100) surface forms long range ordered structural phases at various Bi density. A highly ordered c(2 x 2) reconstruction is accomplished at 0.5 ML, further Bi deposition induces a c(9square root of 2 x square root of 2)R45 degrees structure and a subsequent p(10 x 10) phase related to the formation of regular dislocations arrays. The transition from a c(2 x 2) superstructure to the c(9square root of 2 x square root of 2)R45 degrees phase is accompanied by a sudden decrease in the work function. Photoemission measurements reveal that the Bi induced states close to the Fermi level, associated to the c(2 x 2) phase, are strongly quenched when the arrays of dislocations are formed, while at higher binding energies, they undergo an energy shift probably due to a confinement effect. The low-energy single particle excitations and the electron dispersion of the Bi induced states of the c(2 x 2) phase are compared to the electronic states deduced by theoretical band structure obtained by ab initio calculation performed within the embedding method applied to a realistic semi-infinite system.

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Investigation of the surface bands along theX¯−M¯line of the Cu(100) surface

Cited by 3 publications

References 26 publications

Orbital dependent Rashba splitting and electron-phonon coupling of 2D Bi phase on Cu(100) surface

Orbital dependent Rashba splitting and electron-phonon coupling of 2D Bi phase on Cu(100) surface

The nature of highly anisotropic free-electron-like states in a glycinate monolayer on Cu(100)

Bi ordered phases on Cu(100): Periodic arrays of dislocations influence the electronic properties

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