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4 papers · 2 filters
Rattling and Superconducting Properties of the Cage Compound GaxV2Al20
Zenji Hiroi, Atsushi Onosaka, Yoshihiko Okamoto +2
Low-energy rattling modes and their effects on superconductivity are studied in the cage compound GaxV2Al20. A series of polycrystalline samples of 0 < x =< 0.6 are examined throug…
NMR Investigation of the iron-based superconductors Ca4(Mg,Ti)3Fe2As2O8-y and Ca5(Sc,Ti)4Fe2As2O11-y
Y. Tomita, H. Kotegawa, Y. Tao +5
As and Sc NMR measurements unravel the electronic state for Fe-based superconductors with perovskite-type blocking layers Ca(Mg,Ti)FeAsO ($T_c…
Pressure Study of BiS2-Based Superconductors Bi4O4S3 and La(O,F)BiS2
Hisashi Kotegawa, Yusuke Tomita, Hideki Tou +6
We report the electrical resistivity measurements under pressure for the recently discovered BiS2-based layered superconductors Bi4O4S3 and La(O,F)BiS2. In Bi4O4S3, the transition…
Weak Spin Fluctuation with Finite Wave Vector and Superconducting Gap Symmetry in KxFe2-ySe2: 77Se Nuclear Magnetic Resonance
Hisashi Kotegawa, Yusuke Tomita, Hideki Tou +3
We report Se-nuclear magnetic resonance (NMR) results down to sufficiently low temperatures under magnetic fields parallel to both the -plane and the c-axis in a paramag…