Boron isotope effect in superconducting MgB2

Authors
Bud'ko, SL Lapertot, G Petrovic, C Cunningham, CE Anderson, N Canfield, PC
Citation
Sl. Bud'Ko et al., Boron isotope effect in superconducting MgB2, PHYS REV L, 86(9), 2001, pp. 1877-1880
Citations number
16
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
9
Year of publication
2001
Pages
1877 - 1880
Database
ISI
SICI code
0031-9007(20010226)86:9<1877:BIEISM>2.0.ZU;2-G
Abstract
We report the preparation method of and boron isotope effect for MgB2, a ne w binary intermetallic superconductor with a remarkably high superconductin g transition temperature T-c(B-10) = 40.2 K. Measurements of both temperatu re dependent magnetization and specific heat reveal a 1.0 K shift in T-c be tween (MgB2)-B-11 and (MgB2)-B-10. Whereas such a high transition temperatu re might imply exotic coupling mechanisms, the boron isotope effect in MgB2 is consistent with the material being a phonon-mediated BCS superconductor .