Physics – Condensed Matter – Superconductivity
Scientific paper
2009-06-25
J. Phys. Soc. Jpn. Vol.78 (2009) p083712.
Physics
Condensed Matter
Superconductivity
5 pages, 5 figures, to be published in J. Phys. Soc. Jpn. No.8 issue (2009)
Scientific paper
We report the 75As nuclear quadrupole resonance (NQR) and specific heat measurements of the heavily hole-doped superconductor KFe2As2 (Tc = 3.5 K). The spin-lattice relaxation rate 1/T1 in the superconducting state exhibits quite gradual temperature dependence with no coherence peak below Tc. The quasi-particle specific heat C_QP/T shows small specific heat jump which is about 30% of electronic specific heat coefficient just below Tc. In addition, it suggests the existence of low-energy quasi-particle excitation at the lowest measurement temperature T = 0.4 K \simeq Tc/10. These temperature dependence of 1/T1 and C_QP/T can be explained by multiple nodal superconducting gap scenario rather than multiple fully-gapped s_\pm-wave one within simple gap analysis.
Eisaki Hiroshi
Fukazawa Hedeto
Iyo Akira
Kihou Kunihiro
Kito Hideo
No associations
LandOfFree
Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As-NQR and Specific Heat 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 Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As-NQR and Specific Heat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As-NQR and Specific Heat will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-537246