Naslov
Evidence of 3D Dirac dispersion in PbSnSe by the de Haas - van Alphen oscillations

Autori
Mario Novak, Filip Orbanić, Mirko Baćani, Ivan Kokanović

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

Izvornik
EMRS 2015 Spring Meeting / - , 2015

Skup
European Materials Research Society 2015

Mjesto i datum
Lille, Francuska, 11.04.2015. - 15.04.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Dirac Semimetals; SdH Oscillations

Sažetak
Single crystals of mixed chalcogenide PbSnSe in composition Pb0.83Sn0.17Se is predicted to be a 3D Dirac semimetal. Materials with a 3D linear band dispersion represent a novel class of material which is an extension of the well- known 2D Dirac dispersion in graphene. Recently predicted and discovered materials with the 3D Dirac dispersion are Cd2As3, Na3Bi and topological insulators at the topological phase transition, of which PbSnSe is an example. By SQUID magnetometry up to 5T we have observed well-defined de Haas von Alphon oscillations. Temperature analysis of the dHvA oscillations allowed us to find microscopic parameters such as the scattering time, effective mass and charge concentration. Analyzing the phase of dHvA oscillations we observed the π-Berry phase shift which is a result of the linear band dispersion.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA