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Scientific article
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Optical measurements of the superconducting gap in MgB2

Published inThe European physical journal. B., Condensed matter physics., vol. 21, no. 2, p. 159-161
Publication date2001-05
Abstract

Far-infrared reflectivity studies on the polycrystalline intermetallic compound MgB_2 with a superconducting transition temperature T_c=39 K were performed at temperatures 20 K to 300 K. We observe a significant raise of the superconducting-to-normal state reflectivity ratio below 70 cm^{-1}, with a maximum at about 25-30 cm^{-1}, which gives a lower estimate of the superconducting gap of 2\Delta(0)\approx3-4 meV.

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Citation (ISO format)
GORSHUNOV, B. et al. Optical measurements of the superconducting gap in MgB<sub>2</sub>. In: The European physical journal. B., Condensed matter physics., 2001, vol. 21, n° 2, p. 159–161. doi: 10.1007/s100510170191
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ISSN of the journal1434-6028
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