Diagrammatic quantum Monte Carlo study of an acoustic lattice polaron
| Autor: | Andrey S. Mishchenko, Cesare Franchini, Naoto Nagaosa, Thomas Hahn |
|---|---|
| Přispěvatelé: | Hahn T., Nagaosa N., Franchini C., Mishchenko A.S. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Condensed Matter - Materials Science Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Phonon Quantum Monte Carlo Monte Carlo method Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Polaron 01 natural sciences Optical conductivity 3. Good health Wavelength Lattice (module) Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Condensed Matter::Strongly Correlated Electrons Deformation (engineering) 010306 general physics 0210 nano-technology DiagMC polarons electron-phonon acoustic phonon many-body |
| Popis: | We present the first approximation free diagrammatic Monte Carlo study of a lattice polaron interacting with an acoustic phonon branch through the deformation potential. Weak and strong coupling regimes are separated by a self-trapping region where quantum resonance between various possible lattice deformations is seen in the ground state properties, spectral function, and optical conductivity. The unique feature of such polaron is the interplay between long- and short wavelength acoustic vibrations creating a composite phonon cloud and leading to persistent self-trapping due to the existence of multiple quasi-stable states. This results in a spectral response whose structure is much more complex than in any of the previously considered polaron models. 6 pages, 4 figures + supplemental material |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|