2015.pdf (129.39 kB)
0/0

Nonadiabatic polaronic superconductivity in MgB2 and cuprates

Download (129.39 kB)
journal contribution
posted on 03.04.2006 by A.S. Alexandrov
The Fermi energy, EF, of newly discovered high-Tc superconductor MgB2 and cuprates is estimated from the measured London penetration depth using a parameter-free expression. EF of MgB2 and more than 30 lanthanum, yttrium and mercury-based cuprates appears to be about or below 100 meV, depending on doping. There is every evidence that the remarkable low value of EF and the strong coupling of carriers with high-frequency phonons is the cause of high Tc in all newly discovered superconductors. Taking into account that the carriers mainly reside on oxygen in cuprates, on boron in magnesium-diborade, and on carbon in doped fullerenes, these superconductors form what is essentially nonadiabatic `metallic' oxygen, boron and carbon, respectively. The boron isotope effect on the carrier mass in magnesium-diboride similar to the oxygen isotope effect on the supercarrier mass observed by Guo-meng Zhao et al. in cuprates is predicted.

History

School

  • Science

Department

  • Physics

Pages

106206 bytes

Citation

ALEXANDROV, A.S., 2001. Nonadiabatic polaronic superconductivity in MgB2 and cuprates. Physica C: Superconductivity, 363 (4), pp. 231–236

Publication date

2001

Notes

This article was submitted for publication in the journal Physica C: Superconductivity [© Elsevier] with the title 'Nonadiabatic superconductivity in MgB2 and cuprates'. The definitive version is available at: http://dx.doi.org/10.1016/S0921-4534(01)01095-4.

Language

en

Exports

Logo branding

Keyword(s)

Exports