Pressure-induced order-disorder phase transition in superconducting CaC6

Details Pressure-induced order-disorder phase transition in superconducting CaC6 Pressure-induced order-disorder phase transition in superconducting CaC6

2008-02-22

arxiv.org/abs/0802.3273v1

Physics

Condensed Matter

Superconductivity

9 pages, 3 figures

Scientific paper

By means of synchrotron X-ray diffraction, we studied the effect of high pressure, P, up to 13 GPa on the room temperature crystal structure of superconducting CaC6. In this P range, no change of the pristine space group symmetry, \textit{R\=3m}, is found. However, at 9 GPa, i.e. close to the critical value at which a large T_c reduction was reported recently, we observed a compressibility jump concomitant to a large broadening of Bragg peaks. The reversibility of both effects upon depressurization and symmetry arguments give evidence of an order-disorder phase transition of second order, presumably associated with the Ca sublattice, which provides a full account for the above Tc reduction.

Affiliated with

Also associated with

No associations

Rating

Pressure-induced order-disorder phase transition in superconducting CaC6 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 Pressure-induced order-disorder phase transition in superconducting CaC6, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-induced order-disorder phase transition in superconducting CaC6 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-303177