Enhanced quasiparticle dynamics of quantum well states: the giant Rashba system BiTeI and topological insulators

V. Gnezdilov; P. Lemmens; D. Wulferding; A. Möller; P. Recher; H. Berger; R. Sankar; F. C. Chou

doi:10.1103/PhysRevB.89.195117

Enhanced quasiparticle dynamics of quantum well states: the giant Rashba system BiTeI and topological insulators

Strongly Correlated Electrons 2015-06-15 v2 Materials Science

Authors: V. Gnezdilov , P. Lemmens , D. Wulferding , A. Möller , P. Recher , H. Berger , R. Sankar , F. C. Chou

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Abstract

In the giant Rashba semiconductor BiTeI electronic surface scattering with Lorentzian linewidth is observed that shows a strong dependence on surface termination and surface potential shifts. A comparison with the topological insulator Bi2Se3 evidences that surface confined quantum well states are the origin of these processes. We notice an enhanced quasiparticle dynamics of these states with scattering rates that are comparable to polaronic systems in the collision dominated regime. The Eg symmetry of the Lorentzian scattering contribution is different from the chiral (RL) symmetry of the corresponding signal in the topological insulator although both systems have spin-split surface states.

Keywords

giant Rashba system BiTeI topological insulator quantum well states quasiparticle dynamics surface scattering spin-split surface states

Cite

@article{arxiv.1303.4333,
  title  = {Enhanced quasiparticle dynamics of quantum well states: the giant Rashba system BiTeI and topological insulators},
  author = {V. Gnezdilov and P. Lemmens and D. Wulferding and A. Möller and P. Recher and H. Berger and R. Sankar and F. C. Chou},
  journal= {arXiv preprint arXiv:1303.4333},
  year   = {2015}
}

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6 pages, 5 figures

Enhanced quasiparticle dynamics of quantum well states: the giant Rashba system BiTeI and topological insulators

Abstract

Keywords

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