TY - JOUR
T1 - Experimental evidence for ferromagnetic spin-pairing superconductivity emerging in U Ge2
T2 - A Ge73 -nuclear-quadrupole-resonance study under pressure
AU - Harada, A.
AU - Kawasaki, S.
AU - Mukuda, H.
AU - Kitaoka, Y.
AU - Haga, Y.
AU - Yamamoto, E.
AU - Onuki, Y.
AU - Itoh, K. M.
AU - Haller, E. E.
AU - Harima, H.
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2007/4/3
Y1 - 2007/4/3
N2 - We report that a different type of superconducting order parameter has been realized in the ferromagnetic states in U Ge2 via Ge73 -nuclear-quadrupole- resonance experiments performed under pressure (P). Measurements of the nuclear spin-lattice relaxation rate (1/T1) have revealed an unconventional nature of superconductivity such that the up-spin band is gapped with line nodes, but the down-spin band remains gapless at the Fermi level. This result is consistent with that of a ferromagnetic spin-pairing model in which Cooper pairs are formed among ferromagnetically polarized electrons. The present experiment has shed light on the possible origin of ferromagnetic superconductivity, which is mediated by ferromagnetic spin-density fluctuations relevant to the first-order transition inside the ferromagnetic states.
AB - We report that a different type of superconducting order parameter has been realized in the ferromagnetic states in U Ge2 via Ge73 -nuclear-quadrupole- resonance experiments performed under pressure (P). Measurements of the nuclear spin-lattice relaxation rate (1/T1) have revealed an unconventional nature of superconductivity such that the up-spin band is gapped with line nodes, but the down-spin band remains gapless at the Fermi level. This result is consistent with that of a ferromagnetic spin-pairing model in which Cooper pairs are formed among ferromagnetically polarized electrons. The present experiment has shed light on the possible origin of ferromagnetic superconductivity, which is mediated by ferromagnetic spin-density fluctuations relevant to the first-order transition inside the ferromagnetic states.
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U2 - 10.1103/PhysRevB.75.140502
DO - 10.1103/PhysRevB.75.140502
M3 - Article
AN - SCOPUS:34047248912
SN - 1098-0121
VL - 75
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
M1 - 140502
ER -