Satellite structures in the spectral functions of semiconductor quantum well two-dimensional electron gases: a GW plus cumulant study

Abstract

We present theoretical calculations for the spectral functions and single-particle densities of states of the two-dimensional electron gas in semiconductor quantum wells at different electron densities using the GW+cumulant method. We compare our results to GW only calculations and find significant differences in the description of the satellites between the two theories: while GW theory predicts the existence of a plasmaron excitation, no such excitation is found in GW+cumulant theory. We compare our results to experimental tunneling spectra from semiconductor quantum wells and find good agreement for the satellite properties.

5 pages, 5 figures, submitted to Phys. Rev. B

References in corpus (5)

• Renormalization of Molecular Electronic Levels at Metal-Molecule Interfaces
• Phase Diagram of the Low-Density Two-Dimensional Homogeneous Electron Gas
• The quasiparticle spectral function in doped graphene
• High Resolution Spectroscopy of Two-Dimensional Electron Systems
• Anomalous structure in the single particle spectrum of the fractional quantum Hall effect

Cited by in corpus (17)

• The GW compendium: A practical guide to theoretical photoemission spectroscopy
• Carrier Plasmon Induced Nonlinear Band Gap Renormalization in Two-Dimensional Semiconductors
• Spectral Functions of the Uniform Electron Gas via Coupled-Cluster Theory and Comparison to the $GW$ and Related Approximations
• Satellite Band Structure in Silicon Caused by Electron-Plasmon Coupling
• Ab initio GW plus cumulant calculation for isolated band system: Application to organic conductor (TMTSF)2PF6 and transition-metal oxide SrVO3
• On the combined use of GW approximation and cumulant expansion in the calculations of quasiparticle spectra: The paradigm of Si valence bands
• Finite temperature Green's function approach for excited state and thermodynamic properties of cool to warm dense matter
• Reference Energies for Valence Ionizations and Satellite Transitions
• Dynamically screened vertex correction to $GW$
• The GW plus cumulant method and plasmonic polarons: application to the homogeneous electron gas
• Dispersion and lineshape of plasmon satellites in one, two and three dimensions
• Cumulant expansion in the Holstein model: Spectral functions and mobility
• Plasmon-pole approximation for many-body-effects in extrinsic graphene
• Ab initio multiplet plus cumulant approach for correlation effects in x-ray photoelectron spectroscopy
• Description of quasiparticle and satellite properties via cumulant expansions of the retarded one-particle Green's function
• Applicability of the cumulant expansion method for the calculation of transport properties in electron-phonon systems
• Many-body Green's function approaches to the doped Fröhlich solid: Exact solutions and anomalous mass enhancement