Large magnetoresistance and quantum oscillations in Sn0.05Pb0.95Te.
J Phys Condens Matter
; 33(33)2021 Jun 28.
Article
in En
| MEDLINE
| ID: mdl-34062517
ABSTRACT
We have synthesized high-quality single crystals of SnxPb1-xTe and carried out detailed studies of the magnetotransport properties of one of the samples, Sn0.05Pb0.95Te. Longitudinal magnetoresistance increases almost linearly with increasing applied field (H) and reaches â¼310% atH= 13 T. At higher fields, both longitudinal and Hall resistance show clear Shubnikov de Haas oscillations. The oscillations are smooth and periodic, and there exists only one frequency,fαâ¼ 57 T. However, an additional frequency,fßâ¼ 69 T, appears as the angle between the field direction and the normal to the sample surface (θ) is increased. Bothfαandfßexhibitθ-dependence;fαdecreases whereasfßincreases gradually with increasingθ. The presence of two frequencies in Sn0.05Pb0.95Te indicates that there exist two Fermi surface pockets (αandßpockets). We have constructed the Landau-level fan plot and determined the Berry phase (δ) for theαpocket to beδ⼠0.1. Thisδvalue is very close to the expected value of 0 for a topologically trivial system.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Phys Condens Matter
Journal subject:
BIOFISICA
Year:
2021
Document type:
Article
Affiliation country:
Estados Unidos