Theory for phonon-induced superconductivity in MgB$_2$

Details Theory for phonon-induced superconductivity in MgB$_2$ Theory for phonon-induced superconductivity in MgB$_2$

2001-05-26

arxiv.org/abs/cond-mat/0105507v3

Phys. Rev. B 65, 132518 (2002)

Physics

Condensed Matter

Superconductivity

revised version, accepted for publication in PRB

Scientific paper

10.1103/PhysRevB.65.132518

We analyze superonductivity in MgB$_2$ observed below $T_c=39$ K resulting from electron-phonon coupling involving a mode at $\hbar \omega_1 = 24$ meV and most importantly the in-plane B-B $E_{2g}$ vibration at $\hbar \omega_2=67$ meV. The quasiparticles originating from $\pi$- and $\sigma$-states couple strongly to the low-frequency mode and the $E_{2g}$-vibrations respectively. Using two-band Eliashberg theory, $\lambda_{\pi} = 1.4$ and $\lambda_{\sigma} = 0.7$, we calculate the gap functions $\Delta^{i}(\omega,0)$ ($i=\pi$, $\sigma$). Our results provide an explanation of recent tunneling experiments. We get $H^{ab}_{c_2}/H^{c}_{c_2} \approx 3.9$.

Affiliated with

Also associated with

No associations

Rating

Theory for phonon-induced superconductivity in 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 Theory for phonon-induced superconductivity in MgB$_2$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theory for phonon-induced superconductivity in MgB$_2$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-533648