Topic
Plasmaron
About: Plasmaron is a research topic. Over the lifetime, 78 publications have been published within this topic receiving 1743 citations.
Papers published on a yearly basis
Papers
TL;DR: This work calculates the photoemission spectra of suspended and epitaxial doped graphene using an ab initio cumulant expansion of the Green's function based on the GW self-energy and finds that the spectral function from GW only does not reproduce experimental satellite properties.
Abstract: We calculate the photoemission spectra of suspended and epitaxial doped graphene using an ab initio cumulant expansion of the Green's function based on the GW self-energy. Our results are compared to experiment and to standard GW calculations. For doped graphene on a silicon carbide substrate, we find, in contrast to earlier calculations, that the spectral function from GW only does not reproduce experimental satellite properties. However, ab initio GW plus cumulant theory combined with an accurate description of the substrate screening results in good agreement with experiment, but gives no plasmaron (i.e., no extra well-defined excitation satisfying Dyson's equation).
129 citations
TL;DR: The interpretation of the optical results in a two-band model together with other data confirms recent theoretical estimates of the electron and hole masses and of the charge-carrier density in this compound, which the authors find is a compensated semimetal.
Abstract: The optical reflectivity has been measured over more than four decades of photon energy on chemically well-defined single crystals of ScN, in addition to the electrical conductivity and the Hall effect. From a Kramers-Kronig analysis the dielectric functions have been derived. A plasmon-phonon coupling (plasmaron) has been observed in the far-infrared region which could be decomposed and the phonon part of which compared with a Raman measurement of the phonon density of states. The interpretation of the optical results in a two-band model together with other data confirms recent theoretical estimates of the electron and hole masses and of the charge-carrier density in this compound, which we find is a compensated semimetal.
100 citations
TL;DR: In this article, the authors investigate the mechanism of quasiparticle poisoning in devices subjected to local quasipharm injection and find that poisoning is dominated by the propagation of pair-breaking phonons across the chip.
Abstract: Nonequilibrium quasiparticles represent a significant source of decoherence in superconducting quantum circuits Here we investigate the mechanism of quasiparticle poisoning in devices subjected to local quasiparticle injection We find that quasiparticle poisoning is dominated by the propagation of pair-breaking phonons across the chip We characterize the energy dependence of the time scale for quasiparticle poisoning Finally, we observe that incorporation of extensive normal metal quasiparticle traps leads to a more than order-of-magnitude reduction in quasiparticle loss for a given injected quasiparticle power
71 citations
Journal Article•
TL;DR: In this paper, the strength of the plasmaron quasiparticle excitation in G0W-RPA was evaluated using Angle Resolved PhotoEmission Spectroscopy.
Abstract: Electron-plasmon coupling in graphene has recently been shown to give rise to a \"plasmaron\" quasiparticle excitation. The strength of this coupling has been predicted to depend on the effective screening, which in turn is expected to depend on the dielectric environment of the graphene sheet. Here we compare the strength of enviromental screening for graphene on four different substrates by evaluating the separation of the plasmaron bands from the hole bands using Angle Resolved PhotoEmission Spectroscopy. Comparison with G0W-RPA predictions are used to determine the effective dielectric constant of the underlying substrate layer. We also show that plasmaron and electronic properties of graphene can be independently manipulated, an important aspect of a possible use in \"plasmaronic\" devices.
64 citations
TL;DR: In this paper, the authors present a survey of current investigations of the quasiparticle dynamics in 2D quantum states on metal surfaces, and analyze the role of the key ingredients of the QP dynamics, namely the screened Coulomb interaction at metal surfaces and the overlap of the initial and final states.
64 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 2 |
| 2020 | 1 |
| 2019 | 1 |
| 2018 | 3 |
| 2017 | 4 |
| 2016 | 7 |