Incoherence induced by phonon excitations in domain-growth dynamics: Role of the domain center-of-gravity motion
Author:
- K. IwanoKIK. Iwano
- 22 December 2011
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 84 (23)
Abstract
An ultrafast growth dynamics of a quantum domain after visible or near-infrared photoexcitation is discussed in a one-dimensional system that resides on the first-order phase boundary. Special emphasis is placed on the effects of phonon excitations that are expected to occur in the course of the dynamics. To treat such effects as transparently as possible, we incorporate phonon degrees of freedom into a domain model that consists of two fundamental domain degrees of freedom, namely the spatial extension and the center of gravity. An exact time-evolution calculation within a restricted Hilbert space that almost converges the results indicates that the phonon excitations provide appreciable incoherence to the domain growth especially via overall distributions of the domain center-of-gravity momentum over its nonzero values.Keywords
This publication has 20 references indexed in Scilit:
- Detection of Domain Dynamics by High Energy Photons: Proposals in One-Dimensional Photoinduced Phase Transition SystemsPhysical Review Letters, 2009
- Ultrafast Photoconversion from Charge Density Wave State to Mott–Hubbard State in One-Dimensional Extended Peierls–Hubbard System of Br-Bridged Pd CompoundJournal of the Physical Society of Japan, 2006
- Direct Photoexcitation of Appreciable Size of Domains without Lattice Motion in Neutral-Ionic Transition SystemsPhysical Review Letters, 2006
- Coherent Control of Charge and Lattice Dynamics in a Photoinduced Neutral-to-Ionic Transition of a Charge-Transfer CompoundPhysical Review Letters, 2006
- Gigantic Photoresponse in ¼-Filled-Band Organic Salt (EDO-TTF) 2 PF 6Science, 2005
- Photoinduced phase transition in tetrathiafulvalene--chloranil observed in femtosecond reflection spectroscopyPhysical Review B, 2004
- Ultrafast Optical Switching to a Metallic State by Photoinduced Mott Transition in a Halogen-Bridged Nickel-Chain CompoundPhysical Review Letters, 2003
- Photoinduced Insulator-to-Metal Transition in a Perovskite ManganitePhysical Review Letters, 1997
- Reversible photoinduced phase transitions in single crystals of polydiacetylenesPhysical Review Letters, 1992
- Photoinduced valence instability in the organic molecular compound tetrathiafulvalene-p-chloranil (TTF-CA)Physical Review B, 1990