Nanocrystalline thin films with charge density wave ground state

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DEKIC, Maja, Amra SALČINOVIĆ, Damir DOMINKO, Iva ŠRUT, Kresimir SALAMON, Damir STARESINIC, Katica BILJAKOVIC, Hanjo SCHÄFER, Jure DEMSAR, Gabriel SOCOL, 2013. Nanocrystalline thin films with charge density wave ground state. In: Vacuum. 98, pp. 93-99. ISSN 0042-207X. eISSN 1879-2715. Available under: doi: 10.1016/j.vacuum.2013.03.016

@article{Dekic2013-12Nanoc-42511, title={Nanocrystalline thin films with charge density wave ground state}, year={2013}, doi={10.1016/j.vacuum.2013.03.016}, volume={98}, issn={0042-207X}, journal={Vacuum}, pages={93--99}, author={Dekic, Maja and Salčinović, Amra and Dominko, Damir and Šrut, Iva and Salamon, Kresimir and Staresinic, Damir and Biljakovic, Katica and Schäfer, Hanjo and Demsar, Jure and Socol, Gabriel} }

2013-12 Salčinović, Amra Biljakovic, Katica Dominko, Damir Schäfer, Hanjo Demsar, Jure Staresinic, Damir Dekic, Maja Salamon, Kresimir Nanocrystalline thin films with charge density wave ground state Socol, Gabriel Socol, Gabriel Dominko, Damir Šrut, Iva Šrut, Iva Staresinic, Damir Salamon, Kresimir Demsar, Jure Good understanding of how properties can be tuned by changing the size of material is a basic prerequisite for production of new materials with designed superior properties. Systems with charge density wave (CDW) as a type of coupled electronic-lattice instability (usually found in low dimensional materials) are especially interesting due to their exceptional properties such as giant dielectric constant, nonlinear transport, memory effects, unusual electro-mechanical and thermoelectric properties, all of conceptual importance in various thin film applications. On the other hand, CDW films open the door for studying of meso- and micro-scale aspects of CDW physics caused by finite size effects. Our previously produced thin granular films of CDW prototype system K<sub>0.3</sub>MoO<sub>3</sub> (blue bronze) did not show evidence of CDW condensation in the electrical transport measurements, and femtosecond time-resolved spectroscopy was established as the most appropriate method for characterization of CDW ground state in those nanocrystalline grains. However, the new films prepared by improved pulsed laser deposition (PLD) set-up in optimal conditions and characterized by various standard methods such as GI-XRD, electric transport, TOF-ERDA, AFM and UV–vis spectroscopy exhibit better properties. Electrical resistance decreased by three orders of magnitude and an indication of the Peierls transition is found in films with the best texture, which means that we have achieved the first requirement for testing of other interesting CDW properties related to the size effect (and possible applications of these blue bronze films). Dekic, Maja 2018-06-07T13:56:23Z Schäfer, Hanjo 2018-06-07T13:56:23Z Biljakovic, Katica Salčinović, Amra eng

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