Damping of the de Haas–van Alphen oscillations in the superconducting state of MgB2
J. D. Fletcher, A. Carrington, S. M. Kazakov, J. Karpinski
DOI 10.1103/PhysRevB.70.144501 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The de Haas–van Alphen (dHvA) signal arising from orbits on the π Fermi surface sheet of the two-gap superconductor MgB2 has been observed in the vortex state below Hc2. An extra attenuation of the dHvA signal, beyond those effects described in the conventional Lifshitz-Kosevich expression, is seen due to the opening of the superconducting gap. Our data show that the π band gap is still present up to Hc2. The data are compared to current theories of dHvA oscillations in the superconducting state which allow us to extract estimates for the evolution of the π band gap with magnetic field. Contrary to results for other materials, we find that the most recent theories dramatically underestimate the damping in MgB2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38.5 | Pressure not reported | unknown |
Similar papers
Effects of pressure on the superconducting properties of magnesium diboride
similarity 0.93X. J. Chen et al.
Source status unknown — claims are unverified
Effects of Fe substitution on the transport properties of the superconductor MgB2
similarity 0.93Bhasker Gahtori et al.
Source status unknown — claims are unverified
de Haas–van Alphen effect investigation of the electronic structure of Al-substituted MgB2
similarity 0.93A. Carrington et al.
Source status unknown — claims are unverified
Damping of the de Haas-van Alphen oscillations in the superconducting state of MgB_2
similarity 0.93J. D. Fletcher et al. · 2004 · arXiv:cond-mat/0405120
Source status unknown — claims are unverified
Superconducting transition and phase diagram of single-crystal MgB2
similarity 0.93U. Welp et al.
Source status unknown — claims are unverified
Electrical transport and anisotropic superconducting properties in single crystalline and dense polycrystalline MgB2
similarity 0.93A. K. Pradhan et al.
Source status unknown — claims are unverified