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Quasiparticle excitations in newly discovered antiperovskite superconductor ZnNNi$$_3$$

新規アンチペロブスカイト型超伝導体ZnNNi$$_3$$における準粒子励起

大石 一城*; 伊藤 孝   ; 髭本 亘  ; 山崎 敬大*; 上原 啓*; 小沢 克也*; 君嶋 義英*; 上原 政智*

Oishi, Kazuki*; Ito, Takashi; Higemoto, Wataru; Yamazaki, Takahiro*; Uehara, Akira*; Kozawa, Katsuya*; Kimishima, Yoshihide*; Uehara, Masatomo*

We report on transverse field muon spin rotation measurements of the superconducting penetration depth $$lambda$$ in newly discovered antiperovskite superconductor ZnNNi$$_3$$ in order to investigate the symmetry of order parameter. The penetration depth at $$T$$ = 0 K is estimated to be $$lambda$$(0) = 362(2) nm. Temperature dependence of muon spin relaxation rate $$sigma_v$$ shows $$sim T^2$$ dependence, suggesting unconventional superconductor.

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パーセンタイル:12.12

分野:Physics, Applied

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