Boron isotope effect in superconducting MgB2

被引：890

作者：

Bud'ko, SL

Lapertot, G ^{[1
]}

Petrovic, C

Cunningham, CE

Anderson, N

Canfield, PC

机构：

[1] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.86.1877

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the preparation method of and boron isotope effect for MgB2, a new binary intermetallic superconductor with a remarkably high superconducting transition temperature T-c(B-10) = 40.2 K. Measurements of both temperature dependent magnetization and specific heat reveal a 1.0 K shift in T-c between (MgB2)-B-11 and (MgB2)-B-10. Whereas such a high transition temperature might imply exotic coupling mechanisms, the boron isotope effect in MgB2 is consistent with the material being a phonon-mediated BCS superconductor.

引用

页码：1877 / 1880

页数：4

共 16 条

[1]

AKIMITSU J, 2001, IN PRESS P S TRANS M

[2]

ARMSTRONG DR, 1979, J CHEM SOC F2, P75

[3]

ARONSSON B, 1965, BORIDES SILISIDES PH

[4] THEORY OF SUPERCONDUCTIVITY [J].

BARDEEN, J ;

COOPER, LN ;

SCHRIEFFER, JR .

PHYSICAL REVIEW, 1957, 108 (05) :1175-1204

[5] PROPERTIES OF BOSON-EXCHANGE SUPERCONDUCTORS [J].

CARBOTTE, JP .

REVIEWS OF MODERN PHYSICS, 1990, 62 (04) :1027-1157

[6] Boron isotope effect in single-crystal YNi2B2C and LuNi2B2C superconductors [J].

Cheon, KO ;

Fisher, IR ;

Canfield, PC .

PHYSICA C, 1999, 312 (1-2) :35-39

[7]

FINNEMORE DK, CONDMAT0102114

[8]

FRANCK JP, 1994, PHYSICAL PROPERTIES, V4, P189

[9]

Hoard J.L., 1967, CHEM BORON ITS COMPO

[10]

Kishore R, 1999, STUD HIGH T, V29, P23

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