Optical measurements of the superconducting gap in MgB2

被引：33

作者：

Gorshunov, B

Kuntscher, CA

Haas, P

Dressel, M

Mena, FP

Kuz'menko, AB

van der Marel, D

Muranaka, T

Akimitsu, J

机构：

[1] Univ Stuttgart, Inst Phys 1, D-70550 Stuttgart, Germany

[2] Ctr Mat Sci, Solid State Phys Lab, NL-9747 AG Groningen, Netherlands

[3] Aoyama Gakuin Univ, Dept Phys, Setagaya Ku, Tokyo 157, Japan

来源：

EUROPEAN PHYSICAL JOURNAL B | 2001年 / 21卷 / 02期

关键词：

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

D O I：

10.1007/s100510170191

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

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 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)approximate to 3-4 meV.

引用

页码：159 / 161

页数：3

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