  We report the magneto-conductivity analysis at different temperatures under
magnetic field of up to 5Tesla of a well characterized Bi2Te3 crystal. Details
of crystal growth and various physical properties including high linear magneto
resistance are already reported by some of us. To elaborate upon the transport
properties of Bi2Te3 crystal, the magneto conductivity is fitted to the known
HLN (Hikami Larkin Nagaoka) equation and it is found that the conduction
mechanism is dominated by both surface driven WAL (weak anti localization) and
the bulk WL states. The value of HLN equation coefficient signifying the type
of localization (WL, WAL or both WL and WAL) falls within the range of -0.5 to
-1.5. In our case, the low field (0.25Tesla) fitting of studied crystal
exhibited value close to -0.86 for studied temperatures of up to 50K,
indicating both WAL and WL contributions. The phase coherence length is found
to decrease from 98.266 to 40.314nm with increasing temperature. Summarily, the
short letter reports the fact that bulk Bi2Te3 follows the HLN equation and
quantitative analysis of the same facilitates to know the quality of studied
crystal in terms of WAL to WL contributions and thus the surface to bulk
conduction ratio.
