Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry

Details Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry

2001-06-28

arxiv.org/abs/cond-mat/0106585v1

Physics

Condensed Matter

Superconductivity

submitted March 9th 2001, PRB accepted

Scientific paper

10.1103/PhysRevB.64.172502

We report measurements on MgB2 up to ~40GPa. Increasing pressure yields a monotonous decrease of the lattice parameters and of the c/a ratio, but no structural transition down to parameters smaller than those of AlB2. The transition superconducting temperature also decreases with temperature in a sample dependent way. The results are explained by an increase of the filling of the 2D pxy bands with pressure, the Mg stoichiometry determining the starting position of the Fermi level. Our measurements indicate that these hole bands are the relevant ones for superconductivity.

Affiliated with

Also associated with

No associations

Rating

Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry 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 Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absence of a structural transition up to 40 Gpa in MgB2 and the relevance of magnesium non-stoichiometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-123777