Pd3βBi2βSe2β has been proposed to be topologically non-trivial in
nature. However, evidence of its non-trivial behavior is still unexplored. We
report the growth and magneto-transport study of Pd3βBi2βSe2β thin
films, revealing for the first time the contribution of two-dimensional (2D)
topological surface states. We observe exceptional non-saturated linear
magnetoresistance which results from Dirac fermions inhabiting the lowest
Landau level in the quantum limit. The transverse magnetoresistance changes
from a semi-classical weak-field B2 dependence to a high-field B
dependence at a critical field Bβ. It is found that BββT2, which is expected from the Landau level splitting of a linear energy
dispersion. In addition, the magnetoconductivity shows signatures of 2D weak
anti-localization (WAL). These novel magnetotransport signatures evince the
presence of 2D Dirac fermions in Pd3βBi2βSe2β thin films.Comment: 8 pages, 6 figure