Optical measurements of the superconducting gap in MgB2

B. Gorshunov; C. A. Kuntscher; P. Haas; M. Dressel; F. P. Mena; A. B. Kuz'menko; D. Van Der Marel; T. Muranaka; J. Akimitsu

doi:10.1007/s100510170191

Optical measurements of the superconducting gap in MgB₂

B. Gorshunov, C. A. Kuntscher, P. Haas, M. Dressel, F. P. Mena, A. B. Kuz'menko, D. Van Der Marel, T. Muranaka, J. Akimitsu

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

Far-infrared reflectivity studies on the polycrystalline intermetallic compound MgB₂ 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 superconductmg-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 2Δ(0)≈ 3-4 meV.

Original language	English
Pages (from-to)	159-161
Number of pages	3
Journal	European Physical Journal B
Volume	21
Issue number	2
DOIs	https://doi.org/10.1007/s100510170191
Publication status	Published - May 2 2001
Externally published	Yes

Keywords

74.25.Gz Optical properties
74.70.Ad Metals; alloys and binary compounds (including A15, Laves phases, etc.)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s100510170191

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AU - Gorshunov, B.

AU - Kuntscher, C. A.

AU - Haas, P.

AU - Dressel, M.

AU - Mena, F. P.

AU - Kuz'menko, A. B.

AU - Van Der Marel, D.

AU - Muranaka, T.

AU - Akimitsu, J.

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AB - Far-infrared reflectivity studies on the polycrystalline intermetallic compound MgB2 with a superconducting transition temperature Tc = 39 K were performed at temperatures 20 K to 300 K. We observe a significant raise of the superconductmg-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 2Δ(0)≈ 3-4 meV.

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KW - 74.70.Ad Metals; alloys and binary compounds (including A15, Laves phases, etc.)

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