Surface critical field of MgB2:: the two-band Ginzburg-Landau theory

被引：7
|
作者：
Liu, Minxia [1 ]
机构：
[1] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 03期
关键词：
D O I：
10.1088/0953-2048/20/3/008
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the surface critical field H-c3 of MgB2 in the clean limit using the two-band Ginzburg-Landau (GL) theory. When the surface of a superconductor coincides with one of the crystallographic planes and is parallel to the external magnetic field (H) over right arrow, the ratio H-c3/H-c2 ( where H-c2 is the upper critical field of MgB2) exhibits strong temperature dependence. When the surface of a superconductor coincides with the bc plane and is parallel to (H) over right arrow, the ratio depends not only on temperature, but also on the angle between the c axis and (H) over right arrow. However, for single-band superconductors this ratio is constant.
引用
收藏
页码：157 / 161
页数：5
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