Two regimes in the magnetic field response of superconducting MgB$_2$

Details Two regimes in the magnetic field response of superconducting MgB$_2$ Two regimes in the magnetic field response of superconducting MgB$_2$

2004-03-29

arxiv.org/abs/cond-mat/0403700v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

Using Scanning Tunneling Microscope at low temperature we explore the superconducting phase diagram in the $\pi$-band of the two-band superconductor MgB$_2$. In this band the peculiar shape of the local tunneling spectra and their dynamics in the magnetic field reveal the complex character of the quasiparticle density of states (DOS). The gap in the DOS is first rapidly filled with states in raising the magnetic field up to 0.5 T and then slowly approaches the normal state value : The gap is observed up to 2 T. Such a change in the DOS dynamics suggests the existence of two terms in the DOS of the $\pi$-band: a first one, reflecting an intrinsic superconductivity in the band and a second one, originating from an inter-band coupling to the $\sigma$-band. Our findings allow a deeper understanding of the unique phase diagram of MgB$_2$.

Affiliated with

Also associated with

No associations

Rating

Two regimes in the magnetic field response of superconducting 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 Two regimes in the magnetic field response of superconducting MgB$_2$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two regimes in the magnetic field response of superconducting MgB$_2$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-240845