  We report the high field (up to 14Tesla) magneto-conductivity analysis of
Bi2Se3 topological insulator grown via the self flux method. The detailed
experimental investigations including crystal growth as well as the electrical,
thermal and spectroscopic characterizations of the resultant Bi2Se3 single
crystal are already reported by some of us. The current letter deals with high
field magneto-conductivity analysis in terms of Hikami Larkin Nagaoka (HLN)
model, which revealed that the electronic conduction is dominated by both
surface states driven weak anti localization (WAL), as well the bulk WL (weak
localization) states. Further, by applying the HLN equation we have extracted
the fitting parameters i.e., phase coherence length and the pre-factor. The HLN
equation exhibited values of [pre factor close to -1.0, indicating both WAL and
WL contributions. On the other hand, the extracted phase coherence length is
seen to decrease from 11.125 nm to 5.576 nm as the temperature is increased
from 5K to 200K respectively. Summarily, the short letter discusses primarily
the temperature dependent magneto-conductivity analysis of pristine Bi2Se3
single crystal by the HLN model.
