Anomalously enhanced photoemission from the Dirac point and symmetry of the self-energy variations for the surface states in Bi2Se3

Abstract

Accurate analysis of the photoemission intensity from the surface states of Bi2Se3 reveals two unusual features: spectral line asymmetry and anomalously enhanced photoemission from the Dirac point. The former indicates a certain symmetry of a scattering process, which results in strongly kω-dependent contribution to the imaginary part of the self-energy that changes sign while crossing both the dispersion curves and the energy of the Dirac point. The latter is hard to describe by one particle spectral function while a final state interference seems to be plausible explanation.

References in corpus (9)

• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Transmission of topological surface states through surface barriers
• Self-consistent self-energy analysis of photoemission data
• Bare electron dispersion from photoemission experiments
• Non-monotonic pseudo-gap in high-Tc cuprates
• Photoemission induced gating of topological insulator
• Correction of non-linearity effects in detectors for electron spectroscopy
• Singular Effects of Spin-Flip Scattering on Gapped Dirac Fermions

Cited by in corpus (4)

• Pre-pairing and the "Filling" Gap in the Cuprates From the Tomographic Density of States
• ARPES experiment in fermiology of quasi-2D metals (Review Article)
• Pseudo-ballistic transport in 3D topological insulator quantum wires
• Effects, Determination, and Correction of Count Rate Nonlinearity in Multi-Channel Analog Electron Detectors