Thermodynamic magnetic field and specific heat jump of a bulk superconductor MgB2 using two-band Ginzburg-Landau theory

被引：19

作者：

Askerzade, IN ^{[1
]}

Gencer, A

机构：

[1] Ankara Univ, Fac Sci, Dept Phys, TR-06100 Ankara, Turkey

[2] Azerbaijan Natl Acad Sci, Inst Phys, Baku 370143, Azerbaijan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2002年 / 71卷 / 07期

关键词：

two-band Ginzburg-Landau theory; superconductivity; specific heat jump; thermodynamic magnetic field;

D O I：

10.1143/JPSJ.71.1637

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Temperature dependence of the thermodynamic magnetic field for the superconducting magnesium diboride, MgB2, is studied in the vicinity of T-c using a two-band Ginzburg-Landau (G-L) theory. The results are shown to be in good agreement with calculations from experimental data. In addition, the two-band G-L theory gives a smaller specific heat jump, than a single-band G-L theory.

引用

页码：1637 / 1639

页数：3

共 14 条

[1]

Abrikosov A., 1988, FUNDAMENTALS THEORY

[2] On the Ginsburg-Landau analysis of the upper critical field Hc2 in MgB2 [J].

Askerzade, IN ;

Gencer, A ;

Güçlü, N .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2002, 15 (02) :L13-L16

[3] Two-band Ginzburg-Landau theory for the lower critical field Hc1 in MgB2 [J].

Askerzade, IN ;

Gencer, A ;

Güclü, N ;

Kiliç, A .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2002, 15 (06) :L17-L20

[4] Specific heat of Mg11B2:: Evidence for a second energy cap -: art. no. 047001 [J].

Bouquet, F ;

Fisher, RA ;

Phillips, NE ;

Hinks, DG ;

Jorgensen, JD .

PHYSICAL REVIEW LETTERS, 2001, 87 (04) :47001-1

[5] Boron isotope effect in superconducting MgB2 [J].

Bud'ko, SL ;

Lapertot, G ;

Petrovic, C ;

Cunningham, CE ;

Anderson, N ;

Canfield, PC .

PHYSICAL REVIEW LETTERS, 2001, 86 (09) :1877-1880

[6] Strange quark polarization of the nucleon: A parameter-independent prediction of the chiral potential model [J].

Chen, XB ;

Chen, XS ;

Wang, F .

PHYSICAL REVIEW LETTERS, 2001, 87 (01)

[7]

DRECHSLER SL, 2001, NATO ASI SER, V86

[8] Specific heat of MgB2 in a one- and a two-band model from first-principles calculations [J].

Golubov, AA ;

Kortus, J ;

Dolgov, OV ;

Jepsen, O ;

Kong, Y ;

Andersen, OK ;

Gibson, BJ ;

Ahn, K ;

Kremer, RK .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (06) :1353-1360

[9]

MOSKALENKO VA, 1989, FIZ NIZK TEMP+, V15, P378

[10] Superconductivity at 39 K in magnesium diboride [J].

Nagamatsu, J ;

Nakagawa, N ;

Muranaka, T ;

Zenitani, Y ;

Akimitsu, J .

NATURE, 2001, 410 (6824) :63-64

← 1 2 →