de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2

Details de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2 de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2

2005-04-26

arxiv.org/abs/cond-mat/0504664v2

Phys. Rev. B 72, 060507(R) (2005)

Physics

Condensed Matter

Superconductivity

4 pages with figures

Scientific paper

10.1103/PhysRevB.72.060507

We report a de Haas-van Alphen (dHvA) study of the electronic structure of Al doped crystals of MgB$_2$. We have measured crystals with $\sim 7.5$% Al which have a $T_c$ of 33.6 K, ($\sim 14$% lower than pure MgB$_2$). dHvA frequencies for the $\sigma$ tube orbits in the doped samples are lower than in pure MgB$_2$, implying a $16\pm2%$ reduction in the number of holes in this sheet of Fermi surface. The mass of the quasiparticles on the larger $\sigma$ orbit is lighter than the pure case indicating a reduction in electron-phonon coupling constant $\lambda$. These observations are compared with band structure calculations, and found to be in excellent agreement.

Affiliated with

Also associated with

No associations

Rating

de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-199083