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RESEARCH PRODUCT
Picosecond energy relaxation in
Pablo RichterE. MohlerVladimir DorosinetsHartmut G. RoskosGerhard Jakobsubject
Materials scienceCondensed matter physicsBand gapRelaxation (NMR)Condensed Matter PhysicsLaserElectronic Optical and Magnetic Materialslaw.inventionCondensed Matter::Materials ScienceMagnetizationlawPicosecondFemtosecondCurie temperatureCondensed Matter::Strongly Correlated ElectronsElectrical and Electronic EngineeringExcitationdescription
Abstract Investigating the reflectance response dynamics of La 0.67 Ca 0.33 MnO 3 thin films after excitation by femtosecond laser pulses, we identify for the first time a picosecond relaxation step which only exists below the Curie temperature T C . The relaxation time increases from zero at T C to several picoseconds at low temperatures. The data can be explained with the existence of a magnetization-related effective energy gap, and assuming relaxation between these states to be mediated by a Frohlich-type electron–lattice interaction.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-04-01 | Physica B: Condensed Matter |