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We report the magneto-conductivity analysis at different temperatures undermagnetic field of up to 5Tesla of a well characterized Bi2Te3 crystal. Detailsof crystal growth and various physical properties including high linear magnetoresistance are already reported by some of us. To elaborate upon the transportproperties of Bi2Te3 crystal, the magneto conductivity is fitted to the knownHLN (Hikami Larkin Nagaoka) equation and it is found that the conductionmechanism is dominated by both surface driven WAL (weak anti localization) andthe bulk WL states. The value of HLN equation coefficient signifying the typeof 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 crystalexhibited value close to -0.86 for studied temperatures of up to 50K,indicating both WAL and WL contributions. The phase coherence length is foundto decrease from 98.266 to 40.314nm with increasing temperature. Summarily, theshort letter reports the fact that bulk Bi2Te3 follows the HLN equation andquantitative analysis of the same facilitates to know the quality of studiedcrystal in terms of WAL to WL contributions and thus the surface to bulkconduction ratio.

Hikami-Larkin-Nagaoka (HLN) treatment of the Magneto Conductivity of Bi2Te3 Topological Insulator