Naslov
Transport and spectroscopic properties of the quasi- 1D compound (NbSe4)3I

Autori
Kisiček, Virna ; Dominko, Damir ; Starešinić, Damir

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

Skup
5th Grandmaster Early-Career Workshop in Physics

Mjesto i datum
Prag, Češka Republika, 07.09.2020. - 11.09.2020

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
transport measurements, spectroscopy measurements, CDW, low-dimensional systems

Sažetak
The one-dimensional (1D) electronic systems are a fascinating subject of scientific c research because when con ned to one dimension, itinerant electrons undergo transitions to different types of collective ground states. A common example of such transition is Pierls transition from a high- temperature metallic state to a low-temperature charge density wave (CDW) semiconducting state, due to strong electron-phonon coupling. Halogenated transition metal tetrachalcogenides of the (MX4)nY family (M = Nb ; Ta ; X = S ; Se ; Y = I ; Br) provide a typical example of 1D compounds that can potentially undergo CDW transition and exhibit nonlinear transport properties. To explore those properties we can employ a range of di erent experimental techniques. Among them, dielectric spectroscopy is an appropriate technique for investigation of dynamics of the phase degree freedom in CDW systems. However, to have a complete understanding of the dynamical properties of the material it is important to obtain the information from several complementary experiments. In this seminar, I will present transport and spectroscopic (pump-probe and dielectric) studies on the halogenated niobium tetraselenide, (NbSe4)3I. It is the only representative of 1D halogenated transition metal tetrachalcogenides which does not undergo typical Pierls transition into the CDW ground state. Instead, a structural ferrodisortive transition without a noticeable appearance of the superstructure has been observed. In addition to the properties of the equilibrium state, I will also present some unpublished results of photoinduced metastable states in this compound.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA