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Title: Hikami-Larkin-Nagaoka (HLN) Treatment of the Magneto-Conductivity of Bi{sub 2}Te{sub 3} Topological Insulator

Abstract

We report the magneto-conductivity analysis at different temperatures under a magnetic field of up to 5 T of a well- characterized Bi{sub 2}Te{sub 3} 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 Bi{sub 2}Te{sub 3} crystal, the magneto-conductivity is fitted to the known Hikami-Larkin-Nagaoka (HLN) equation and it is found that the conduction mechanism is dominated by both surface-driven weak anti-localization (WAL) and the bulk weak localization (WL) states. The value of HLN equation coefficient (α) 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 (± 0.25 T) fitting of studied crystal exhibited a value of α close to − 0.86 for studied temperatures of up to 50 K, indicating both WAL and WL contributions. The phase coherence length (l{sub φ}) is found to decrease from 98.266 to 40.314 nm with increasing temperature. Summarily, the short letter reports the fact that bulk Bi{sub 2}Te{sub 3} follows the HLN equation and quantitative analysis of the same facilitates to know the quality of studied crystal in terms of WALmore » to WL contributions and thus the surface to bulk conduction ratio.« less

Authors:
 [1]; ; ;  [2];  [1]
  1. National Physical Laboratory (CSIR) (India)
  2. Jawaharlal Nehru University, School of Physical Sciences (India)
Publication Date:
OSTI Identifier:
22773866
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 8; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH TELLURIDES; COHERENCE LENGTH; CRYSTAL GROWTH; EQUATIONS; MAGNETIC FIELDS; MAGNETORESISTANCE; TEMPERATURE DEPENDENCE; TOPOLOGY

Citation Formats

Sultana, Rabia, Gurjar, Ganesh, Neha, P., Patnaik, S., and Awana, V. P. S.,. Hikami-Larkin-Nagaoka (HLN) Treatment of the Magneto-Conductivity of Bi{sub 2}Te{sub 3} Topological Insulator. United States: N. p., 2018. Web. doi:10.1007/S10948-018-4762-0.
Sultana, Rabia, Gurjar, Ganesh, Neha, P., Patnaik, S., & Awana, V. P. S.,. Hikami-Larkin-Nagaoka (HLN) Treatment of the Magneto-Conductivity of Bi{sub 2}Te{sub 3} Topological Insulator. United States. doi:10.1007/S10948-018-4762-0.
Sultana, Rabia, Gurjar, Ganesh, Neha, P., Patnaik, S., and Awana, V. P. S.,. Wed . "Hikami-Larkin-Nagaoka (HLN) Treatment of the Magneto-Conductivity of Bi{sub 2}Te{sub 3} Topological Insulator". United States. doi:10.1007/S10948-018-4762-0.
@article{osti_22773866,
title = {Hikami-Larkin-Nagaoka (HLN) Treatment of the Magneto-Conductivity of Bi{sub 2}Te{sub 3} Topological Insulator},
author = {Sultana, Rabia and Gurjar, Ganesh and Neha, P. and Patnaik, S. and Awana, V. P. S.,},
abstractNote = {We report the magneto-conductivity analysis at different temperatures under a magnetic field of up to 5 T of a well- characterized Bi{sub 2}Te{sub 3} 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 Bi{sub 2}Te{sub 3} crystal, the magneto-conductivity is fitted to the known Hikami-Larkin-Nagaoka (HLN) equation and it is found that the conduction mechanism is dominated by both surface-driven weak anti-localization (WAL) and the bulk weak localization (WL) states. The value of HLN equation coefficient (α) 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 (± 0.25 T) fitting of studied crystal exhibited a value of α close to − 0.86 for studied temperatures of up to 50 K, indicating both WAL and WL contributions. The phase coherence length (l{sub φ}) is found to decrease from 98.266 to 40.314 nm with increasing temperature. Summarily, the short letter reports the fact that bulk Bi{sub 2}Te{sub 3} 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.},
doi = {10.1007/S10948-018-4762-0},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 8,
volume = 31,
place = {United States},
year = {2018},
month = {8}
}