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Report No.

Unconventional superconductivity in PuRhGa$$_{5}$$; Ga NMR/NQR study

Sakai, Hironori  ; Tokunaga, Yo ; Fujimoto, Tatsuya; Kambe, Shinsaku ; Walstedt, R. E.; Yasuoka, Hiroshi; Aoki, Dai*; Homma, Yoshiya*; Yamamoto, Etsuji ; Nakamura, Akio; Shiokawa, Yoshinobu; Nakajima, Kunihisa ; Arai, Yasuo; Matsuda, Tatsuma; Haga, Yoshinori ; Onuki, Yoshichika

$$^{69,71}$$ Ga NMR/NQR studies have been performed on a single crystal of the transuranium superconductor PuRhGa$$_{5}$$ with $$T_{c}$$=9 K. The spin-lattice relaxation rate $$1/T_{1}$$ reveals that PuRhGa$$_{5}$$ is an unconventional superconductor having an anisotropic superconducting gap. Moreover, Korringa behavior ($$1/T_{1} T = const.$$) is observed in the normal state below 30 K. This result suggests that the superconductivity sets in after the formation of a Fermi liquid state in this compound.



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Category:Physics, Condensed Matter



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