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Crystal growth and magneto-transport of Bi2Se3 single crystals

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journal contribution
posted on 2017-11-06, 09:46 authored by Geet Awana, Rabia Sultana, P.K. Maheshwari, Reena Goyal, Bhasker Gahtori, Anurag Gupta, V.P.S. Awana
In this letter, we report on the growth and characterization of bulk Bi2Se3 single crystals. The studied Bi2Se3 crystals are grown by the self-flux method through the solid-state reaction from high-temperature (950 °C) melt of constituent elements and slow cooling (2 °C/h). The resultant crystals are shiny and grown in the [00l] direction, as evidenced from surface XRD. Detailed Reitveld analysis of powder X-ray diffraction (PXRD) of the crystals showed that these are crystallized in the rhombohedral crystal structure with a space group of R3m (D5), and the lattice parameters are a = 4.14 (2), b = 4.14 (2), and c = 28.7010 (7) A° . Temperature versus resistivity (ρ − T ) plots revealed metallic conduction down to 2 K, with typical room temperature resistivity (ρ300 K) of around 0.53 mΩ- cm and residual resistivity (ρ0 K) of 0.12 mΩ-cm. Resistivity under magnetic field [ρ(T )H] measurements exhibited large+ve magneto-resistance right from 2 to 200 K. Isothermal magneto-resistance [ρH] measurements at 2, 100, and 200 K exhibited magneto-resistance (MR) of up to 240 %, 130 %, and 60 %, respectively, at 14 T. Further, the MR plots are nonsaturating and linear with the field at all temperatures. At 2 K, the MR plots showed clear quantum oscillations at above say 10 T applied field. Also, the Kohler plots, i.e., Δρ/ρo versus B/ρ, were seen consolidating on one plot. Interestingly, the studied Bi2Se3 single crystal exhibited the Shubnikov-de Haas (SdH) oscillations at 2 K under different applied magnetic fields ranging from 4 to 14 T.

History

School

  • Science

Department

  • Physics

Published in

Journal of Superconductivity and Novel Magnetism

Volume

30

Issue

4

Pages

853 - 856

Citation

AWANA, G. ...et al., 2017. Crystal growth and magneto-transport of Bi2Se3 single crystals. Journal of Superconductivity and Novel Magnetism, 30(4), pp. 853-856.

Publisher

© Springer

Version

  • AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2017

Notes

This is a post-peer-review, pre-copyedit version of an article published in Journal of Superconductivity and Novel Magnetism. The final authenticated version is available online at: https://doi.org/10.1007/s10948-017-3999-3

ISSN

1557-1939

eISSN

1557-1947

Language

  • en