Enhanced Superconductivity by Rare-earth Metal-doping in Phenanthrene

Details Enhanced Superconductivity by Rare-earth Metal-doping in Phenanthrene Enhanced Superconductivity by Rare-earth Metal-doping in Phenanthrene

2012-03-27

arxiv.org/abs/1203.5887v1

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures

Scientific paper

We successfully synthesized La- and Sm-doped phenanthrene powder samples and discovered superconductivity at $T_{\rm c}$ around 6 K in them. The $T_{\rm c}$s are 6.1 K for LaPhenanthrene and 6.0 K for SmPhenanthrene, which are enhanced by about 1 K and 0.5 K compared to those in $A_3$Phenanthrene ($A$=K and Rb) and in $Ae_{1.5}$Phenanthrene ($Ae$ = Sr and Ba) superconductors respectively. The superconductive shielding fractions for LaPhenanthrene and SmPhenanthrene are 46.1%$ and 49.8$%$ at 2 K, respectively. The little effect of the doping of the magnetic ion Sm$^{3+}$ on $T_c$ and the positive pressure dependence coefficient on $T_{\rm c}$ strongly suggests unconventional superconductivity in the doped phenanthrene superconductors. The charge transfer to organic molecules from dopants of La and Sm induces a redshift of 7 cm$^{-1}$ per electron for the mode at 1441 cm$^{-1}$ in the Raman spectra, which is almost the same as those observed in $A_3$Phenanthrene ($A$=K and Rb) and $Ae_{1.5}$Phenanthrene ($Ae$ = Sr and Ba) superconductors.

Affiliated with

Also associated with

No associations

Rating

Enhanced Superconductivity by Rare-earth Metal-doping in Phenanthrene 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 Enhanced Superconductivity by Rare-earth Metal-doping in Phenanthrene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced Superconductivity by Rare-earth Metal-doping in Phenanthrene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-639210