• help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Return to the previous page

Anisotropic superconducting gap in transuranium superconductor PuRhGa$$_{5}$$; Ga NQR study on a single crystal

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 $$T_{c}sim 9$$ K. We have observed a $$^{69}$$Ga NQR line at $$sim$$29.15 MHz, and assigned it to the $$4i$$ Ga site using the NMR results. The $$^{69}$$Ga NQR spin-lattice relaxation rate $$1/T_{1}$$ shows no coherence peak just below $$T_{rm c}$$, but obeys $$T^{3}$$ behavior below $$T_{rm c}$$. This result strongly suggests that PuRhGa$$_{5}$$ is an unconventional superconductor having an anisotropic superconducting gap. The gap amplitude 2$$Delta_{0}(Trightarrow 0)simeq5k_{rm B}T_{rm c}$$ and the residual density of states $$N_{rm res}(T=0)/N_{rm 0}(T=T_{rm c})simeq$$ 0.25 have been determined assuming a simple polar function of the form $$Delta(theta,phi)$$=$$Delta_{0}costheta$$, where $$theta$$ and $$phi$$ are angular parameters on the Fermi surface.

Language

 :

English

Journal

 :

Journal of the Physical Society of Japan

Volume

 :

74

Number

 :

6

Pages

 :

p.1710 - 1713

Publication Year/Month

 :

2005/06

Meeting title

 :

Held date

 :

Location (city)

 :

Location (country)

 :

Patent information

 :

PDF

 :


Paper URL

 :

https://doi.org/10.1143/JPSJ.74.1710

DOI for research data

 :

Keywords

 :

超伝導; 超ウラン化合物; PuRhGa$$_{5}$$; NMR; NQR; 緩和率; 異方的超伝導

Research Facility

 :

Press Release

 :

Article of JAEA R&D Review

 :

Investigation of New Plutonium-Based Superconductor; Identification of Exotic Superconducting State by Nuclear Magnetic Resonance[/]

Cooperating Institute

 :

東北大学金属材料研究所; 大阪大学

Accesses

 :

- Accesses

InCites™

 :

Percentile:90.09

Category:Physics, Multidisciplinary

Altmetrics

 :

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.

Return to the previous page