Coherent modulation of theatomic structure by displacive stimulated ionic Raman scattering
- 31 March 2015
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 91 (9), 094308
- https://doi.org/10.1103/physrevb.91.094308
Abstract
We discuss the mechanism of coherent phonon generation by stimulated ionic Raman scattering, a process different from conventional excitation with near visible optical pulses. Ionic Raman scattering is driven by anharmonic coupling between a directly excited infrared-active phonon mode and other Raman modes. We experimentally study the response of to the resonant excitation of apical oxygen motions at 20 THz by midinfrared pulses, which has been shown in the past to enhance the interlayer superconducting coupling. We find coherent oscillations of four totally symmetric Raman modes and make a critical assessment of the role of these oscillatory motions in the enhancement of superconductivity.
Keywords
Funding Information
- Seventh Framework Programme (FP7/2007-2013)
- European Research Council (319286 (QMAC))
This publication has 24 references indexed in Scilit:
- Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5Nature, 2014
- Theory of nonlinear phononics for coherent light control of solidsPhysical Review B, 2014
- Optically induced coherent transport far abovein underdopedPhysical Review B, 2014
- Optically enhanced coherent transport in YBa2Cu3O6.5 by ultrafast redistribution of interlayer couplingNature Materials, 2014
- Displacive lattice excitation through nonlinear phononics viewed by femtosecond X-ray diffractionSolid State Communications, 2013
- Ultrafast Strain Engineering in Complex Oxide HeterostructuresPhysical Review Letters, 2012
- Driving magnetic order in a manganite by ultrafast lattice excitationPhysical Review B, 2011
- Nonlinear phononics as an ultrafast route to lattice controlNature Physics, 2011
- Control of the electronic phase of a manganite by mode-selective vibrational excitationNature, 2007
- Dynamics and coherent control of high-amplitude optical phonons in bismuthPhysical Review B, 2001