Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.197602
Keywords
-
Categories
Funding
- NSF [DMR-0080054, DMR-0701558, DMR-0404335]
- ONR [N00014-04-1-0413, N00014-08-1-0915]
- DOE [DE-FG02-05ER46188]
Ask authors/readers for more resources
A first-principle-based technique is used to investigate dynamical coupling between polarization and picosecond time-scale strain pulses in ferroelectric nanolayers. Two different dynamical mechanisms are found. The first mechanism concerns homogeneous dipole patterns, is governed by the ultrafast soft-mode dynamics, mostly consists in the modification of the dipoles' magnitude, and leads to a polarization only weakly changing and following the strain pulse via an usual coupling law. On the other hand, the second mechanism occurs in highly inhomogeneous dipole patterns, is characterized by a large change in polarization and by a time delay between polarization and strain, and is governed by the slower breathing of dipolar inhomogeneities. This second mechanism provides a successful explanation of puzzling experimental data.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available