Theory of parametrically amplified electron-phonon superconductivity
Mehrtash Babadi, Michael Knap, Ivar Martin, Gil Refael, Eugene Demler
DOI 10.1103/PhysRevB.96.014512 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Ultrafast optical manipulation of ordered phases in strongly correlated materials is a topic of significant theoretical, experimental, and technological interest. Inspired by a recent experiment on light-induced superconductivity in fullerenes [M. Mitrano et al., Nature (London) 530, 461 (2016)], we develop a comprehensive theory of light-induced superconductivity in driven electron-phonon systems with lattice nonlinearities. In analogy with the operation of parametric amplifiers, we show how the interplay between the external drive and lattice nonlinearities lead to significantly enhanced effective electron-phonon couplings. We provide a detailed and unbiased study of the nonequilibrium dynamics of the driven system using the real-time Green's function technique. To this end, we develop a Floquet generalization of the Migdal-Eliashberg theory and derive a numerically tractable set of quantum Floquet-Boltzmann kinetic equations for the coupled electron-phonon system. We study the role of parametric phonon generation and electronic heating in destroying the transient superconducting state. Finally, we predict the transient formation of electronic Floquet bands in time- and angle-resolved photoemission spectroscopy experiments as a consequence of the proposed mechanism.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| K3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
Similar papers
Electron-phonon coupling for aromatic molecular crystals: Possible consequences for their superconductivity
similarity 0.96A. Devos & M. Lannoo
Source status unknown — claims are unverified
Electron-phonon coupling strength and implications for superconductivity in alkali-metal-doped fullerenes
similarity 0.94R. A. Jishi & M. S. Dresselhaus
Source status unknown — claims are unverified
First-principles structural optimization and electronic structure of the superconductor picene for various potassium doping levels
similarity 0.94Taichi Kosugi et al.
Source status unknown — claims are unverified
High-resolution thermal expansion of superconducting fullerides A3C60(A=K,Rb)
similarity 0.93G. J. Burkhart & C. Meingast
Source status unknown — claims are unverified
Quantitative theory of superconductivity in doped C60
similarity 0.93I. I. Mazin et al.
Source status unknown — claims are unverified
Superconducting and normal-state properties of nonavalent fullerides
similarity 0.93Y. Iwasa et al.
Source status unknown — claims are unverified