Pressure dependence of the superconducting transition temperature of magnesium diboride

Authors
Monteverde, M Nunez-Regueiro, M Rogado, N Regan, KA Hayward, MA He, T Loureiro, SM Cava, RJ
Citation
M. Monteverde et al., Pressure dependence of the superconducting transition temperature of magnesium diboride, SCIENCE, 292(5514), 2001, pp. 75-77
Citations number
20
Categorie Soggetti
Multidisciplinary,Multidisciplinary,Multidisciplinary
Journal title
SCIENCE
ISSN journal
00368075 → ACNP
Volume
292
Issue
5514
Year of publication
2001
Pages
75 - 77
Database
ISI
SICI code
0036-8075(20010406)292:5514<75:PDOTST>2.0.ZU;2-U
Abstract
We studied the pressure and temperature dependence of the electrical resist ivity of the superconducting compound magnesium diboride (MgB2). The superc onducting transition temperature decreases monotonically with pressure, bei ng parabolic or linear, depending on samples. The rate of decrease under pr essure is higher than in conventional superconductors. We discuss our resul ts in terms of the semimetallic character of the electronic band structure of MgB2.