Strong-coupling d-wave superconductivity in PuCoGa5 probed by point-contact spectroscopy

Nature Communications

Volumn 3, Issue , 2012, Pages

  Daghero, D ^a   Tortello, M ^a   Ummarino, G A ^a   Griveau, J C ^b   Colineau, E ^b   Eloirdi, R ^b   Shick, A B ^b,c   Kolorenc, J ^c   Lichtenstein, A I ^d   Caciuffo, R ^b  

^a POLITECNICO DI TORINO   (Italy)

^b JOINT RESEARCH CENTRE   (Italy)

^c INSTITUTE OF PHYSICS   (Czech Republic)

^d UNIVERSITY OF HAMBURG   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

COBALT; GALLIUM; PLUTONIUM;

ARTICLE; ELECTRON; FERMION; POINT CONTACT SPECTROSCOPY; SPECTROSCOPY; SUPERCONDUCTOR; TEMPERATURE;

EID: 84860273558     PISSN: None     EISSN: 20411723     Source Type: Journal    
DOI: 10.1038/ncomms1785     Document Type: Article

References (57)

1. Sarrao, J. L. et al. Plutonium-based superconductivity with a transition temperature above 18 K. Nature 420, 297-299 (2002). (Pubitemid 35398180)
2. Bauer, E. D. et al. Structural tuning of unconventional superconductivity in PuMGa5 (M≤Co,Rh). Phys. Rev. Lett. 93, 147005 (2004).
3. Heffner, R. H. et al. μSR studies of Pu metal and the Pu-based superconductor PuCoGa5. J. Phys. Soc. Jpn. 75S, 14-19 (2006).
4. Morris, G. D. et al. μSR studies of the superconducting order parameter in PuCoGa5. Physica B 374-375, 180-183 (2006). (Pubitemid 43333051)
5. Hiess, A. et al. Electronic state of PuCoGa5 and NpCoGa5 as probed by polarized neutrons. Phys. Rev. Lett. 100, 076403 (2008).
6. Curro, N. J. et al. Unconventional superconductivity in PuCoGa5. Nature 434, 622-625 (2005).
7. Opahle, I. & Oppeneer, P. M. Superconductivity caused by the pairing of plutonium 5f electrons in PuCoGa5. Phys. Rev. Lett. 90, 157001 (2003).
8. Maehira, T., Hotta, T., Ueda, K. & Hasegawa, A. Electronic structure and the fermi surface of PuCoGa5 and NpCoGa5. Phys. Rev. Lett. 90, 207007 (2003).
9. Opahle, I., Elgazzar, S., Koepernik, K. & Oppeneer, P. M. Electronic structure of the Pu-based superconductor PuCoGa5 and of related actinide-115 compounds. Phys. Rev. B 70, 104504 (2004).
10. Tanaka, K., Ikeda, H. & Yamada, K. Theory of superconductivity in PuCoGa5. J. Phys. Soc. Jpn. 73, 1285-1289 (2004).
11. Shick, A. B., Janiš, V. & Oppeneer, P. M. Effect of coulomb correlations on the electronic structure of PuCoGa5. Phys. Rev. Lett. 94, 016401 (2005).
12. Pourovskii, L. V., Katsnelson, M. I. & Lichtenstein, A. I. Correlation effects in electronic structure of PuCoGa5. Phys. Rev. B 73, 060506 (2006).
13. Zhu, J.- X. et al. Electronic structure and correlation effects in PuCoIn5 as compared to PuCoGa5. Europhys. Lett 97, 57001 (2012).
14. Shick, A. B., Rusz, J., Kolorenč, J., Oppeneer, P. M. & Havela, L. Theoretical investigation of electronic structure, electric field gradients, and photoemission of PuCoGa5 and PuRhGa5 superconductors. Phys. Rev. B 83, 155105 (2011).
15. x: a low carrier density superconductor near itinerant magnetism. Phys. Rev. Lett. 100, 237003 (2008).
16. Bang, Y., Balatsky, A. V., Wastin, F. & Thompson, J. D. Possible pairing mechanisms of PuCoGa5 superconductor. Phys. Rev. B 70, 104512 (2004).
17. Boulet, P. et al. Tuning of the electronic properties in PuCoGa5 by actinide (U, Np) and transition-metal (Fe, Rh, Ni) substitutions. Phys. Rev. B 72, 104508 (2005).
18. Ohishi, K. et al. Muon spin rotation measurements of the superfluid density in fresh and aged superconducting PuCoGa5. Phys. Rev. B 76, 064504 (2007).
19. Jutier, F. et al. Possible mechanism of superconductivity in PuCoGa5 probed by self-irradiation damage. Phys. Rev. B 77, 024521 (2008).
20. Monthoux, P., Pines, D. & Lonzarich, G. G. Superconductivity without phonons. Nature 450, 1177-1183 (2007).
21. Pfleiderer, C. Superconducting phases of f -electron compounds. Rev. Mod. Phys. 81, 1551-1624 (2009).
22. Flint, R., Dzero, M. & Coleman, P. Heavy electrons and the symplectic symmetry of spin. Nat. Phys. 4, 643-648 (2008).
23. Talbayev, D. et al. Hybridization and superconducting gaps in the heavy-fermion superconductor PuCoGa5 probed via the dynamics of photoinduced quasiparticles. Phys. Rev. Lett. 104, 227002 (2010).
24. Naidyuk, Yu.G. & Yanson, I. K. Point-contact spectroscopy of heavy-fermion systems. J. Phys. Condens. Matter 10, 8905 (1998).
25. Daghero, D., Tortello, M., Ummarino, G. A. & Gonnelli, R. S. Directional point-contact Andreev-reflection spectroscopy of Fe-based superconductors: Fermi surface topology, gap symmetry and electron-boson interaction. Rep. Prog. Phys. 74, 124509 (2011).
26. Park, W. K., Sarrao, J. L., Thompson, J. D. & Greene, L. H. Andreev reflection in heavy-fermion superconductors and order parameter symmetry in CeCoIn5. Phys. Rev. Lett. 100, 177001 (2008).
27. Nowack, A. et al. Point-contact spectra of heavy-fermion superconductors UBe13 and UPt3. Phys. Rev. B 36, 2436 (1987).
28. Hasselbach, K., Kirtley, J. R. & Lejay, P. Point-contact spectroscopy of superconducting URu2Si2. Phys. Rev. B 46, 5826 (1992).
29. Rodrigo, J. G., Guinea, F., Vieira, S. & Aliev, F. G. Point-contact spectroscopy of superconducting URu2Si2. Phys. Rev. B 55, 14318 (1997).
30. Goll, G., Löhneysen, H. v., Yanson, I. K. & Taillefer, L. Anisotropy of point-contact spectra in the heavy-fermion superconductor UPt3. Phys. Rev. Lett. 70, 2008 (1993).
31. Fogelström, M., Park, W. K., Greene, L. H., Goll, G. & Graf, M. J. Point-contact spectroscopy in heavy-fermion superconductors. Phys. Rev. B 82, 014527 (2010).
32. Coleman, P. Handbook of magnetism and advanced magnetic materials. In Fundamentals and Theory Vol 1 (eds Kronmuller, H. & Parkin, S.) 95-148 (John Wiley and Sons, 2007).
33. Deutscher, G. Andreev-Saint-James reflections: a probe of cuprate superconductors. Rev. Mod. Phys. 77, 109-135 (2005). (Pubitemid 41508752)
34. Wei, J. Y. T., Yeh, N.- C., Garrigus, D. F. & Strasik, M. Directional tunneling and Andreev reflection on YBa2Cu3O7 - d single crystals: predominance of d-wave pairing symmetry verified with the generalized Blonder, Tinkham, and Klapwijk theory. Phys. Rev. Lett. 81, 2542-2545 (1998). (Pubitemid 128790432)
35. 4. Phys. Rev. Lett. 88, 207004 (2002).
36. 4: the dependence of conductance-voltage spectra on cerium doping, barrier strength, and magnetic field. Phys. Rev. B 68, 024502 (2003).
37. Blonder, G. E., Tinkham, M. & Klapwijk, T. M. Transition from metallic to tunneling regimes in superconducting microconstrictions: excess current, charge imbalance, and supercurrent conversion. Phys. Rev. B 25, 4515-4532 (1982).
38. Kashiwaya, S., Tanaka, Y., Koyanagi, M. & Kajimura, K. Theory for tunneling spectroscopy of anisotropic superconductors. Phys. Rev. B 53, 2667-2676 (1996).
39. Kashiwaya, S. & Tanaka, Y. Tunnelling effects on surface bound states in unconventional superconductors. Rep. Prog. Phys. 63, 1641 (2000).
40. Daghero, D. & Gonnelli, R. S. Probing multiband superconductivity by point-contact spectroscopy. Supercond. Sci. Technol. 23, 043001 (2010).
41. Eliashberg, G. M. Interactions between electrons and lattice vibrations in a superconductor. Sov. Phys. JETP 11, 696-702 (1960).
42. Carbotte, J. P. Properties of boson-exchange superconductors. Rev. Mod. Phys. 62, 1027-1157 (1990).
43. Schachinger, E. & Carbotte, J. P. Microwave conductivity of YBa2Cu3O6.99 including inelastic scattering. Phys. Rev. B 65, 064514 (2002).
44. Monthoux, P., Balatsky, A. V. & Pines, D. Toward a theory of high-temperature superconductivity in the antiferromagnetically correlated cuprate oxides. Phys. Rev. Lett. 67, 3448-3451 (1991).
45. Baek, S.-H. et al. Anisotropic spin fluctuations and superconductivity in '115' heavy-fermion compounds: 59Co NMR Study in PuCoGa5. Phys. Rev. Lett. 105, 217002 (2010).
46. 8+x. Physica C 328, 189 (1999).
47. Goll, G. et al. Point-contact spectroscopy on heavy-fermion superconductors. Physica B 378-380, 665-668 (2006). (Pubitemid 44269225)
48. Shigeta, I., Tanuma, Y., Asano, Y., Hiroi, M. & Tanaka, Y. Tunneling study through analysis of spatial variations of the pair potential in diffusive normal metal/insulator/high-Tc superconductor junctions. J. Phys. Chem. Solids 69, 3042 (2008).
49. Kolorenč, J. Private communication.
50. Hewson, A. C. The Kondo Problem to Heavy Fermions (Cambridge University Press, 1993).
51. Shick, A. B. & Pickett, W. E. Magnetism, spin-orbit coupling, and superconducting pairing in UGe2. Phys. Rev. Lett. 86, 300-303 (2001). (Pubitemid 32131701)
52. Shick, A. B., Kolorenč, J., Lichtenstein, A. I. & Havela, L. Electronic structure and spectral properties of Am, Cm, and Bk: charge-density self-consistent LDA+HIA calculations in the FP-LAPW basis. Phys. Rev. B 80, 085106 (2009).
53. Pezzoli, M. E., Haule, K. & Kotliar, G. Neutron magnetic form factor in strongly correlated materials. Phys. Rev. Lett. 106, 016403 (2011).
54. Joyce, J. J. et al. Photoemission and the electronic structure of PuCoGa5. Phys. Rev. Lett. 91, 176401 (2003).
55. Eloirdi, R. et al. Photoelectron spectroscopy study of PuCoGa5 thin films. J. Nucl. Mater. 385, 8-10 (2009).
56. Shim, J. H., Haule, K. & Kotliar, G. Fluctuating valence in a correlated solid and the anomalous properties of d-plutonium. Nature 446, 513-516 (2007). (Pubitemid 46514728)
57. Lawrence, J. M., Riseborough, P. S. & Parks, R. D. Valence fluctuation phenomena. Rep. Prog. Phys. 44, 1-84 (1981).