Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
1-15-2018
Journal or Book Title
Physical Review B
Volume
97
First Page
035135
DOI
10.1103/PhysRevB.97.035135
Abstract
Ultrafast perturbations offer a unique tool to manipulate correlated systems due to their ability to promote transient behaviors with no equilibrium counterpart. A widely employed strategy is the excitation of coherent optical phonons, as they can cause significant changes in the electronic structure and interactions on short time scales. One of the issues, however, is the inevitable heating that accompanies these resonant excitations. Here, we explore a promising alternative route: the nonequilibrium excitation of acoustic phonons, which, due to their low excitation energies, generally lead to less heating. We demonstrate that driving acoustic phonons leads to the remarkable phenomenon of a momentum-dependent effective temperature, by which electronic states at different regions of the Fermi surface are subject to distinct local temperatures. Such an anisotropic effective electronic temperature can have a profound effect on the delicate balance between competing ordered states in unconventional superconductors, opening a so far unexplored avenue to control correlated phases.
Copyright Owner
American Physical Society
Copyright Date
2018
Language
en
File Format
application/pdf
Recommended Citation
Schütt, Michael; Orth, Peter; Levchenko, Alex; and Fernandes, Rafael M., "Controlling competing orders via nonequilibrium acoustic phonons: Emergence of anisotropic effective electronic temperature" (2018). Physics and Astronomy Publications. 482.
https://lib.dr.iastate.edu/physastro_pubs/482
Comments
This article is published as Schütt, Michael, Peter P. Orth, Alex Levchenko, and Rafael M. Fernandes. "Controlling competing orders via nonequilibrium acoustic phonons: Emergence of anisotropic effective electronic temperature." Physical Review B 97, no. 3 (2018): 035135. DOI: 10.1103/PhysRevB.97.035135. Posted with permission.