Title | Coupled electron-impurity and electron-phonon systems as trivial non-Fermi liquids |
Publication Type | Journal Article |
Year of Publication | 2019 |
Authors | D. Buterakos, and S. Das Sarma |
Journal | Phys. Rev. B |
Volume | 100 |
Pagination | 235149 |
Date Published | DEC 30 |
Type of Article | Article |
ISSN | 2469-9950 |
Abstract | We consider an electron gas, both in two (2D) and three (3D) dimensions, interacting with quenched impurities and phonons within leading order finite-temperature many-body perturbation theories, calculating the electron self-energies, spectral functions, and momentum distribution functions at finite temperatures. The resultant spectral function is in general highly non-Lorentzian, indicating that the system is not a Fermi liquid in the usual sense. The calculated momentum distribution function cannot be approximated by a Fermi function at any temperature, providing a rather simple example of a non-Fermi liquid with well-understood properties. |
DOI | 10.1103/PhysRevB.100.235149 |