Naslov
K0.3MoO3 THIN FILMS WITH CHARGE DENSITY WAVES (CDW)

Autori
Đekić, Maja ; Salčinović Fetić, Amra ; Dominko, Damir ; Šrut Iva ; Salamon, Krešimir, Starešinić, Damir ; Biljaković, Katica ; Schäfer, Hanjo ; Demsar, Jure ; Socol, Gabriel ; Ristoscu, Carmen ; Mihailescu, Ion N. ; Siketić, Zdravko ; Bogdanović Radović, Iva ; Marcus, Jacques

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Metallic glasses: past, present & future / Salčinović Fetić, Amra - Sarajevo : Physical Society in Bosnia and Herzegovina, Zmaja od Bosne 33, Sarajevo, 2014, 20-20

Skup
Metallic glasses: past, present & future

Mjesto i datum
Sarajevo, Bosna i Hercegovina, 25.09.2014. - 28.09.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
charge density wave; blue bronze; thin films; variable range hopping

Sažetak
Quasi‐one‐dimensional metal (q‐1D) K0.3MoO3, exhibits so‐called Peierls transition to a charge density wave (CDW) state with periodic charge density modulation and concomitant lattice distortion at a transition temperature Tp=180 K. Despite the fact that the physical properties of q‐1d bulk materials have been widely investigated, they can drastically change due to reduced dimensionality if the material is in the form of thin film. We present results of the production of K0.3MoO3 thin films by pulsed laser deposition (PLD). Standard characterization techniques showed that our films are composed of nano‐sized metallic grains and presence of CDW in grains was unambiguously proved by femto‐second time resolved spectroscopy (fs‐Trs). This technique also showed that the amplitude mode appears in films at a temperature that is some 30 K lower than in the crystal. Transport measurements in a wide temperature range indicated smeared Peierls transition in some films, at a temperature that is some 30 K lower than in bulk, which is in accordance with fs‐Trs. We have established a connection between film morphology and resistance, namely films with better ordering show lower resistance and more pronounced anomaly at 150 K. Furthermore, our films appear to be well fit by variable range hopping conductivity (VRH) in the almost entire temperature range, which is a characteristic of disordered materials.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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