Naslov
Unconventional temperature shift of quantum- oscillation frequency in topological insulator BiSbTe2S

Autori
Mario Novak, Bruno Gudac, Filip Orbanić, Munisa Nurmamat, Akio Kimura, and Ivan Kokanović

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

Izvornik
28th International Scientific Meeting on Vacuum Science and Technique / Maja Mičetić, Krešimir Salamon - Zagreb : Hrvatsko Vakuumsko Društvo (HVD), 2022, 41-41

ISBN
978-953-7941-42-0

Skup
28th International Scientific Meeting on Vacuum Science and Technique

Mjesto i datum
Selce, Hrvatska, 18.05.2022. - 20.05.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Topological insulator

Sažetak
BiSbTe2S doped with Sn is believed to be the “perfect” topological insulator [1] with the Fermi energy located in the energy gap. In our samples, we observed well-pronounced quantum oscillations (QOs) that survive up to 30 K. Measuring the QOs at different temperatures, we observed the shift in the frequency to lower values as the temperature is increased. Up to our knowledge, this is the first experimental evidence of this kind of behavior. The surface-sensitive ARPES measurement didn’t observe any change in the position of the Fermi level as a function of temperature, Fig1. Indicating that the oscillations are coming from the bulk and not the Dirac surface states. Future experiments using ion-liquid gating, which allows tuning the Fermi level, have to be carried on to unambiguously find out the origin of the observed QOs.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA