Pressure dependence of Tc in the MgB2 superconductor as probed by resistivity measurements

Abstract

High-pressure resistivity experiments were performed on the recently discovered superconductor, MgB2. Tc decreases quasi-linearly with applied pressure to 1.4 GPa at a rate of -2.0(1) K/GPa, which is somewhat larger than that derived from recently-reported ac susceptibility measurements. The reduction of Tc is consistent with the BCS picture, in a similar way to the C60-based superconductors. Taking into account the pressure dependence of the unit cell volume, V, the volume coefficient of Tc, d(lnTc)/dV is significantly large.

6 pages, 2 figures

References in corpus (1)

• Boron Isotope Effect in Superconducting MgB${}_2$

Cited by in corpus (7)

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• Dependence of the Superconducting Transition Temperature of MgB2 on Pressure to 20 GPa
• Effect of pressure on the superconducting Tc of MgB2
• Study of pressure effect on the magnetic penetration depth in MgB${}_2$
• Two band gap field-dependent thermal conductivity of $Mg{B}_2$
• Strongly interacting $\sigma$-electrons and MgB${}_2$ superconductivity