Naslov
Large temperature hysteresis in transport properties of Cu2Se

Autori
Zorić, Marija ; P. Gille, P. ; Smontara, Ana ; Popčević, Petar

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

Izvornik
Solid-State Science & Research Meeting / - Zagreb, 2019, 68-68

Skup
Solid State Science and Research Meeting

Mjesto i datum
Zagreb, Hrvatska, 27.06.2019. - 29.06.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Cu2Se, thermoelectric material

Sažetak
Cu2Se, as a competitive thermoelectric material, has attracted much attention in recent developments of thermoelectrics, due to the large figure of merit (ZT), which is among highest for single crystalline compounds (1.5 at 1000K). The excellent thermoelectric performance of Cu2Se is associated with its superionic behavior in the high-temperature β-phase. Although β-phase was extensively investigated, comprehensive insight of α phase (low temperature phase) is still lacking. Thus, we started more detailed investigation of transport properties of CuxSe at low temperatures. The properties of CuxSe α phase considerably depend on x and so does the transition temperature from low-temperature α phase to high-temperature β phase. Our results suggest presence of additional phase transition from α to α' phase at lower temperatures and show large temperature hysteresis. Furthermore, our results are consistent that composition of the samples investigated here are close to phase boundary and due to this show enhanced metallic behavior.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geodezija

POVEZANOST RADA