Hikami-Larkin-Nagaoka (HLN) Fitting of Magneto Transport of Bi2Se3 Single Crystal in Different Magnetic Field Ranges

TL;DR

This study investigates the magneto-transport properties of Bi2Se3 single crystals, demonstrating weak anti-localization effects and fitting the data with the Hikami-Larkin-Nagaoka model across various magnetic fields.

Contribution

It provides a detailed analysis of the magneto-transport behavior of Bi2Se3 crystals using HLN fitting in different magnetic field ranges, highlighting WAL dominance.

Findings

Weak anti-localization observed at low temperatures.

HLN fitting confirms WAL as the dominant conduction mechanism.

Magneto-resistance varies with magnetic field strength.

Abstract

We report the detailed study of structural micro-structuraland high magnetic field magneto transport propertiesof Bi2Se3single crystal. Bi2Se3 single crystal is grown through conventional solid-state reaction route via the self-flux method. Rietveld analysis on Powder X-ray Diffraction showed that the studied Bi2Se3 crystal is crystallized in single-phase without any impurity. The surface morphology analyzed through Scanning Electron Microscopy study which shows that as-grown single crystal exhibit layered type structure and the quantitative weight of the atomic constituents (Bi and Se) are found to be closeto the stoichiometric amount in energy-dispersive X-ray spectroscopy analysis. Low temperature (2.5K) magneto-resistance (MR) exhibited a v-type cusp around origin at lower magnetic field, which is the sign of weak anti-localization effect. Further, Bi2Se3 single crystal magneto conductivity data is fitted by well-known HLN equation in different magnetic field range of 2Tesla, 4Tesla and 6Tesla and the resultant found that the conduction mechanism of Bi2Se3 is dominated by WAL state.