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Stability of the Bi2Se3(111) topological state: Electron-phonon and electron-defect scattering

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Stability of the Bi2Se3(111) topological state: Electron-phonon and electron-defect scattering. / Hatch, Richard Cannon; Bianchi, Marco; Guan, Dandan; Shining, Bao; Iversen, Bo Brummerstedt; Nilsson, Louis; Hornekær, Liv; Hofmann, Philip.

In: Physical Review B, Vol. 83, 14.06.2011, p. 241303.

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@article{a999bff3160b4608adf3656b5cf0fc8a,
title = "Stability of the Bi2Se3(111) topological state: Electron-phonon and electron-defect scattering",
abstract = "The electron dynamics of the topological surface state on Bi2Se3(111) is investigated by temperature-dependentangle-resolved photoemission. The electron-phonon coupling strength is determined in a spectral region forwhich only intraband scattering involving the topological surface band is possible. The electron-phonon couplingconstant is found to be λ = 0.25(5), more than an order of magnitude higher than the corresponding value forintraband scattering in the noble-metal surface states. The stability of the topological state with respect to surfaceirregularities was also tested by introducing a small concentration of surface defects via ion bombardment. It isfound that, in contrast to the bulk states, the topological state can no longer be observed in the photoemissionspectra, and this cannot merely be attributed to surface defect-induced momentum broadening.",
author = "Hatch, {Richard Cannon} and Marco Bianchi and Dandan Guan and Bao Shining and Iversen, {Bo Brummerstedt} and Louis Nilsson and Liv Hornek{\ae}r and Philip Hofmann",
year = "2011",
month = jun,
day = "14",
doi = "10.1103/PhysRevB.83.241303",
language = "English",
volume = "83",
pages = "241303",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Stability of the Bi2Se3(111) topological state: Electron-phonon and electron-defect scattering

AU - Hatch, Richard Cannon

AU - Bianchi, Marco

AU - Guan, Dandan

AU - Shining, Bao

AU - Iversen, Bo Brummerstedt

AU - Nilsson, Louis

AU - Hornekær, Liv

AU - Hofmann, Philip

PY - 2011/6/14

Y1 - 2011/6/14

N2 - The electron dynamics of the topological surface state on Bi2Se3(111) is investigated by temperature-dependentangle-resolved photoemission. The electron-phonon coupling strength is determined in a spectral region forwhich only intraband scattering involving the topological surface band is possible. The electron-phonon couplingconstant is found to be λ = 0.25(5), more than an order of magnitude higher than the corresponding value forintraband scattering in the noble-metal surface states. The stability of the topological state with respect to surfaceirregularities was also tested by introducing a small concentration of surface defects via ion bombardment. It isfound that, in contrast to the bulk states, the topological state can no longer be observed in the photoemissionspectra, and this cannot merely be attributed to surface defect-induced momentum broadening.

AB - The electron dynamics of the topological surface state on Bi2Se3(111) is investigated by temperature-dependentangle-resolved photoemission. The electron-phonon coupling strength is determined in a spectral region forwhich only intraband scattering involving the topological surface band is possible. The electron-phonon couplingconstant is found to be λ = 0.25(5), more than an order of magnitude higher than the corresponding value forintraband scattering in the noble-metal surface states. The stability of the topological state with respect to surfaceirregularities was also tested by introducing a small concentration of surface defects via ion bombardment. It isfound that, in contrast to the bulk states, the topological state can no longer be observed in the photoemissionspectra, and this cannot merely be attributed to surface defect-induced momentum broadening.

U2 - 10.1103/PhysRevB.83.241303

DO - 10.1103/PhysRevB.83.241303

M3 - Journal article

VL - 83

SP - 241303

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

ER -