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

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.

6 pages, 5 figures

References in corpus (9)

• Strong spin-orbit splitting on Bi surfaces
• Inelastic Light Scattering From Correlated Electrons
• Signatures of a Pressure-Induced Topological Quantum Phase Transition in BiTeI
• Infrared and Raman spectroscopy measurements of a transition in the crystal structure and a closing of the energy gap of BiTeI under pressure
• Magneto-transport in copper-doped noncentrosymmetric BiTeI
• Origin of Rashba-splitting in the quantized subbands at Bi2Se3 surface
• A new experimental approach for the exploration of topological quantum phenomena : Topological Insulators and Superconductors
• Spin-Chiral Bulk Fermi Surfaces of BiTeI Proven by Quantum Oscillations
• Temperature dependent infrared spectroscopy of the Rashba spin-splitting semiconductor BiTeI

Cited by in corpus (10)

• Optical phonon dynamics and electronic fluctuations in the Dirac semimetal Cd3As2
• Exfoliation of single layer BiTeI flakes
• Probing lattice dynamics and electron-phonon coupling in topological nodal-line semimetal ZrSiS
• Anomalous Phonon-mode Dependence in Polarized Raman Spectroscopy of Topological Weyl Semimetal TaP
• Temperature dependence of the topological phase transition of BiTeI from first principles
• Effect of topology on quasi-particle interactions in the Weyl semimetal WP${}_2$
• Chiral Electronic Excitations in a Quasi-2D Rashba System BiTeI
• Non-trivial phonon dynamics and significant electron-phonon coupling of the high frequency modes in a Dirac semimetal
• Spin-Mediated Direct Photon Scattering by Plasmons in BiTeI
• Enhanced Edelstein effect and interdimensional effects in an electron gas with Rashba spin-orbit coupling interface