Crystal Growth and Magneto-transport of Bi2Se3 Single Crystals
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Crystal Growth and Magneto-transport of Bi2Se3 Single Crystals
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| Creator |
Awana, Geet
Sultana , Rabia Maheshwari, P. K. Goyal, Reena Gahtori, Bhasker Gupta, Anurag Awana, V. P. S. |
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| Subject |
Applied Physics/Condensed Matter
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| Description |
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 degrees C) melt of constituent elements and slow cooling (2 degrees 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) over circle. Temperature versus resistivity (rho-T) plots revealed metallic conduction down to 2 K, with typical room temperature resistivity (rho(300 K)) of around 0.53 m Omega-cm and residual resistivity (rho(0 K)) of 0.12 m Omega-cm. Resistivity under magnetic field [rho(T) H] measurements exhibited large+ve magneto-resistance right from 2 to 200 K. Isothermal magneto-resistance [rho H] 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., Delta rho/rho o versus B/rho, 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.
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| Publisher |
Springer Verlag
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| Date |
2017-04
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/2647/1/Crystal%20Growth%20and%20Magneto-transport.pdf
Awana, Geet and Sultana , Rabia and Maheshwari, P. K. and Goyal, Reena and Gahtori, Bhasker and Gupta, Anurag and Awana, V. P. S. (2017) Crystal Growth and Magneto-transport of Bi2Se3 Single Crystals. Journal of Superconductivity and Novel Magnetism, 30 (4). pp. 853-856. ISSN 1557-1939 |
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| Relation |
http://npl.csircentral.net/2647/
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