Disentanglement of the Electronic and Lattice Parts of the Order Parameter in a 1D Charge Density Wave System Probed by Femtosecond Spectroscopy
| Autor: | M. Beyer, Katica Biljaković, Hanjo Schäfer, Jure Demsar, Viktor V. Kabanov |
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| Rok vydání: | 2010 |
| Předmět: |
Supraleitung
ultrafast Phonon Ordungsparameter FOS: Physical sciences General Physics and Astronomy Festkörperphysik [gnd] pacs:72.15.Nj pacs:78.47.J order parameter Condensed Matter - Strongly Correlated Electrons Condensed Matter::Superconductivity Lattice (order) ddc:530 Spectroscopy pacs:71.45.Lr Physics Condensed Matter - Materials Science Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics charge density wave Materials Science (cond-mat.mtrl-sci) eindimensional Linear coupling Ultrakurzzeit Amplitude Condensed Matter::Strongly Correlated Electrons Ladungsdichtewelle one dimensional superconductivity Femtochemistry Ultrashort pulse Charge density wave disentanglement electronic lattice charge density wave system femtosecond spectroscopy |
| Zdroj: | Physical Review Letters. 105 |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | We report on the high resolution studies of the temperature (T) dependence of the q=0 phonon spectrum in the quasi one-dimensional charge density wave (CDW) compound K0.3MoO3 utilizing time-resolved optical spectroscopy. Numerous modes that appear below Tc show pronounced T-dependences of their amplitudes, frequencies and dampings. Utilizing the time-dependent Ginzburg-Landau theory we show that these modes result from linear coupling of the electronic part of the order parameter to the 2kF phonons, while the (electronic) CDW amplitude mode is overdamped. Comment: 4 pages, 3 figures + supplementary material, accepted for publication in Phys. Rev. Lett |
| Databáze: | OpenAIRE |
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