Charge density waves in nanocrystalline thin films of blue bronze K0.3MoO3

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2012
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Staresinic, Damir
Dominko, Damir
Salamon, Kresimir
Biljakovic, Katica
Tomeljak, Andrej
Huber, Tim
Socol, Gabriel
Ristoscu, Carmen
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Thin granular films of charge density wave (CDW) system K0.3MoO3 were prepared by pulsed laser deposition and investigated by various standard characterization methods such as GI-XRD, electric transport, TOF-ERDA, AFM and UV–visible spectroscopy. While all these methods indicate that the thin films consist of nanometer grains of K0.3MoO3, it is only the non-destructive femtosecond time-resolved spectroscopy (fsTRS) that demonstrates the charge density wave nature of the ground state and therefore proves directly the presence of K0.3MoO3. Furthermore, the comparison of the fsTRS data obtained in thin films and in single crystals shows the reduction of the charge density wave transition temperature and of the photoinduced signal strength in granular thin films with respect to single crystals, which is attributed to the granularity and crystal growth morphology. Our results establish fsTRS technique as the essential tool for the detection and characterization of complex ground states in nano-sized systems.

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530 Physik
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Change density waves, Femtosecond time-resolved, Spectroscopy, Thin film, Nanoparticles
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ISO 690STARESINIC, Damir, Damir DOMINKO, Kresimir SALAMON, Katica BILJAKOVIC, Andrej TOMELJAK, Hanjo SCHÄFER, Tim HUBER, Jure DEMSAR, Gabriel SOCOL, Carmen RISTOSCU, 2012. Charge density waves in nanocrystalline thin films of blue bronze K0.3MoO3. In: Physica B: Condensed Matter. Elsevier. 2012, 407(11), pp. 1889-1893. ISSN 0921-4526. eISSN 1873-2135. Available under: doi: 10.1016/j.physb.2012.01.056
BibTex
@article{Staresinic2012-06Charg-48609,
  year={2012},
  doi={10.1016/j.physb.2012.01.056},
  title={Charge density waves in nanocrystalline thin films of blue bronze K<sub>0.3</sub>MoO<sub>3</sub>},
  number={11},
  volume={407},
  issn={0921-4526},
  journal={Physica B: Condensed Matter},
  pages={1889--1893},
  author={Staresinic, Damir and Dominko, Damir and Salamon, Kresimir and Biljakovic, Katica and Tomeljak, Andrej and Schäfer, Hanjo and Huber, Tim and Demsar, Jure and Socol, Gabriel and Ristoscu, Carmen}
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