110 citations · 207 across the 3 of their papers we have counts for
9 papers
Abrupt Emergence of Pressure-Induced Superconductivity of 34 K in SrFe2As2: A Resistivity Study under Pressure
H. Kotegawa, H. Sugawara, H. Tou
We report resistivity measurement under pressure in single crystals of SrFe_2As_2, which is one of the parent materials of Fe-based superconductors. The structural and antiferromag…
Evidence for Unconventional Superconductivity in Arsenic-Free Iron-Based Superconductor FeSe : A ^77Se-NMR Study
H. Kotegawa, S. Masaki, Y. Awai +3
We report the results of Se--nuclear magnetic resonance (NMR) in -FeSe, which exhibits a similar crystal structure to the LaFeAsOF superconductor and shows su…
Evidence for unconventional superconducting fluctuations in heavy-fermion compound CeNi2Ge2
S. Kawasaki, T. Sada, T. Miyoshi +8
We present evidence for unconventional superconducting fluctuations in a heavy-fermion compound CeNiGe. The temperature dependence of the Ge nuclear-spin-lattice-rel…
Cooperative Phenomenon of Ferromagnetism and Unconventional Superconductivity in UGe: A ^73^Ge-NQR Study under Pressure
Atsushi Harada, Shinji Kawasaki, Hisashi Kotegawa +7
We report on a cooperative phenomenon of ferromagnetism and unconventional superconductivity (SC) in UGe through the measurements of Ge nuclear-quadrupole-resonance (NQR…
Novel Phase Transition Near the Quantum Critical Point in the Filled-Skutterudite Compound CeOs4Sb12: an Sb-NQR Study
Mamoru Yogi, Hisashi Kotegawa, Guo-qing Zheng +4
We report on a novel phase transition at = 0.9 K in the Ce-based filled-skutterudite compound CeOsSb via measurements of the nuclear-spin lattice relaxation rate $…
Evidence for Uniform Coexistence of Ferromagnetism and Unconventional Superconductivity in UGe_2: A ^73Ge-NQR Study under Pressure
H. Kotegawa, A. Harada, S. Kawasaki +8
We report on the itinerant ferromagnetic superconductor UGe_2 through ^73Ge-NQR measurements under pressure (P). The P dependence of the NQR spectrum signals a first-order transiti…