Dependence of the superconducting transition temperature of single- and polycrystalline MgB2 on hydrostatic pressure
arXiv:cond-mat/0209270 · doi:10.1016/S0921-4534(02)02300-6
Abstract
The dependence of Tc for MgB2 on purely hydrostatic or nearly hydrostatic pressure has been determined to 23 GPa for single-crystalline and to 32 GPa for polycrystalline samples, and found to be in good agreement. Tc decreases from 39 K at ambient pressure to 15 K at 32 GPa with an initial slope dTc/dP = -1.11(2) K/GPa. Evidence is presented that the differing values of dTc/dP reported in the literature result primarily from shear-stress effects in nonhydrostatic pressure media and not differences in the samples. Although comparison of these results with theory supports phonon-mediated superconductivity, a critical test of theory must await volume-dependent calculations based on the solution of the anisotropic Eliashberg equations.
arXiv commentInvited paper for a special edition of Physica on MgB2
References in corpus (27)
- Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps
- Electron-phonon interaction in the normal and superconducting states of MgB2
- Evidence for two superconducting energy gaps in MgB2 by point-contact spectroscopy
- Specific Heat of Mg ^{11}B_2
- First-Principles Calculation of the Superconducting Transition in MgB2 within the Anisotropic Eliashberg Formalism
- Superconducting Properties of MgB2 Bulk Materials Prepared by High Pressure Sintering
- Temperature and field dependence of the anisotropy of MgB2
- Lattice Properties of MgB2 versus Temperature and Pressure
- Evidence for Two-Band Superconductivity from Break Junction Tunneling on MgB2
- Effect of lattice strain and defects on the superconductivity of MgB2
- High-Resolution Photoemission Study of MgB2
- Raman spectrum and lattice parameters of MgB2 as a function of pressure
- High Pressure Study on MgB2
- Synthesis and Stoichiometry of MgB2
- Effect of sintering temperature under high pressure in the uperconductivity for MgB2
- Calculated elastic and electronic properties of MgB at high pressures
- Substitution effect of Zn and Cu in MgB2 on Tc and structure
- The Dependence of Tc on Hydrostatic Pressure in Superconducting MgB2
- Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry
- Pressure dependence of Tc in the MgB2 superconductor as probed by resistivity measurements
- The band structure of MgB with different lattice constants
- Dependence of the Superconducting Transition Temperature of MgB2 on Pressure to 20 GPa
- Effects of pressure on the superconducting properties of magnesium diboride
- Effect of pressure on the superconducting Tc of MgB2
- Anisotropic Superconducting Properties of MgB2 Single Crystals
- Electronic Structures of MgB{} under Uniaxial and Hydrostatic Compression
- Electric field gradients in s-, p- and d-metal diborides and the effect of pressure on the band structure and T in MgB
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- Study of pressure effect on the magnetic penetration depth in MgB
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