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Superconductivity in alkali-metal-doped picene

Nature volume 464, pages 76–79 (2010)Cite this article

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Abstract

Efforts to identify and develop new superconducting materials continue apace, motivated by both fundamental science and the prospects for application. For example, several new superconducting material systems have been developed in the recent past, including calcium-intercalated graphite compounds1, boron-doped diamond2 and—most prominently—iron arsenides such as LaO1–xF x FeAs (ref. 3). In the case of organic superconductors, however, no new material system with a high superconducting transition temperature (Tc) has been discovered in the past decade. Here we report that intercalating an alkali metal into picene, a wide-bandgap semiconducting solid hydrocarbon, produces metallic behaviour and superconductivity. Solid potassium-intercalated picene (K x picene) shows Tc values of 7 K and 18 K, depending on the metal content. The drop of magnetization in K x picene solids at the transition temperature is sharp (<2 K), similar to the behaviour of Ca-intercalated graphite1. The Tc of 18 K is comparable to that of K-intercalated C60 (ref. 4). This discovery of superconductivity in K x picene shows that organic hydrocarbons are promising candidates for improved Tc values.

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Figure 1: Molecular structure, crystal structure and physical appearance of picene.
Figure 2: Temperature dependence of M/H.
Figure 3: Superconducting phase diagrams.

References

  1. Emery, N. et al. Superconductivity of bulk CaC6 . Phys. Rev. Lett. 95, 087003 (2005)

    Article  ADS  CAS  Google Scholar 

  2. Ekimov, E. A. et al. Superconductivity in diamond. Nature 428, 542–545 (2004)

    Article  ADS  CAS  Google Scholar 

  3. Kamihara, Y., Watanabe, T., Hirano, M. & Hosono, H. Iron-based layered superconductor La[O1-xFx]FeAs (x = 0.05 – 0.12) with T c = 26 K. J. Am. Chem. Soc. 130, 3296–3297 (2008)

    Article  CAS  Google Scholar 

  4. Hebard, A. F. et al. Superconductivity at 18 K in potassium-doped C60 . Nature 350, 600–601 (1991)

    Article  ADS  CAS  Google Scholar 

  5. Tanigaki, K. et al. Superconductivity at 33 K in CsxRbyC60 . Nature 352, 222–223 (1991)

    Article  ADS  CAS  Google Scholar 

  6. Fleming, R. M. et al. Relation of structure and superconducting transition temperatures in A3C60 . Nature 352, 787–788 (1991)

    Article  ADS  CAS  Google Scholar 

  7. Palstra, T. T. M. et al. Superconductivity at 40 K in cesium doped C60 . Solid State Commun. 93, 327–330 (1995)

    Article  ADS  CAS  Google Scholar 

  8. Ganin, A. Y. et al. Bulk superconductivity at 38 K in a molecular system. Nature Mater. 7, 367–371 (2008)

    Article  ADS  CAS  Google Scholar 

  9. Takabayashi, Y. et al. The disorder-free non-BCS superconductor Cs3C60 emerges from an antiferromagnetic insulator parent state. Science 323, 1585–1590 (2009)

    Article  ADS  CAS  Google Scholar 

  10. Weller, T. E. et al. Superconductivity in the intercalated graphite compounds, C6Yb and C6Ca. Nature Phys. 1, 39–41 (2005)

    Article  ADS  CAS  Google Scholar 

  11. Hannay, N. B. et al. Superconductivity in graphitic compounds. Phys. Rev. Lett. 14, 225–226 (1965)

    Article  ADS  CAS  Google Scholar 

  12. Minakata, T. et al. Conducting thin films of pentacene doped with alkaline metals. J. Appl. Phys. 74, 1079–1082 (1993)

    Article  CAS  Google Scholar 

  13. Matsuo, Y., Sasaki, S. & Ikehata, S. Stage structure and electrical properties of rubidium-doped pentacene. Phys. Lett. A 321, 62–66 (2004)

    Article  ADS  CAS  Google Scholar 

  14. Kaneko, Y., Suzuki, T., Matsuo, Y. & Ikehata, S. Metallic electrical conduction in alkaline metal-doped pentacene. Synth. Met. 154, 177–180 (2005)

    Article  CAS  Google Scholar 

  15. Okamoto, H. et al. Air-assisted high-performance field-effect transistor with thin films of picene. J. Am. Chem. Soc. 130, 10470–10471 (2008)

    Article  CAS  Google Scholar 

  16. Kawasaki, N. et al. Trap states and transport characteristics in picene thin film field-effect transistor. Appl. Phys. Lett. 94, 043310 (2009)

    Article  ADS  Google Scholar 

  17. Kaji, Y. et al. High-performance C60 and picene thin film field-effect transistors with conducting polymer electrodes in bottom contact structure. Org. Electron. 10, 432–436 (2009)

    Article  CAS  Google Scholar 

  18. De, A., Ghosh, R., Roychowdhury, S. & Roychowdhury, P. Structural analysis of picene, C22H14 . Acta Crystallogr. C 41, 907–909 (1985)

    Article  Google Scholar 

  19. Schirber, J. E. et al. Pressure-temperature phase diagram, inverse isotope effect, and superconductivity in excess of 13 K in κ-(BEDT-TTF)2Cu[N(CN)2]Cl, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene. Phys. Rev. B 44, 4666–4669 (1991)

    Article  ADS  CAS  Google Scholar 

  20. Hansson, A., Bohlin, J. & Stafstrom, S. Structural and electronic transitions in potassium-doped pentacene. Phys. Rev. B 73, 184114 (2006)

    Article  ADS  Google Scholar 

Download references

Acknowledgements

The X-ray diffraction patterns were measured with synchrotron radiation at KEK-PF (proposal no. 2007G612), Tsukuba, Japan. This work was supported in part by Grants-in-Aid 20045012 and 18340104 from MEXT, Japan.

Author Contributions R.M., Y.S., Y.Y. and H.M. contributed equally to the preparation of superconducting picene materials and to the performance of magnetic susceptibility measurements with the assistance of T.K. and Y.K.; H.O. and M.Y. synthesized high-quality picene; N.K. and Y.M. provided assistance with X-ray diffraction measurements; N.I. and A.F. provided discussions and suggestions for the overall project, and discussed the experimental data with T.K. and Y.K.; Y.K. was responsible for the overall project direction, planning and integration among different research units.

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Authors and Affiliations

  1. Research Laboratory for Surface Science,,

    Ryoji Mitsuhashi, Hiroki Mitamura, Naoko Kawasaki & Yoshihiro Kubozono

  2. Department of Physics,,

    Yuta Suzuki, Yusuke Yamanari, Takashi Kambe & Naoshi Ikeda

  3. Department of Chemistry, Okayama University, Okayama 700-8530, Japan,

    Hideki Okamoto

  4. Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 812-8581, Japan

    Hideki Okamoto

  5. Japan Advanced Institute of Science and Technology, Ishikawa, 923-1292, Japan ,

    Akihiko Fujiwara

  6. Department of Chemistry and Chemical Biology, Gunma University, Kiryu 376-8515, Japan

    Minoru Yamaji

  7. Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan

    Yutaka Maniwa

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  1. Ryoji Mitsuhashi
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  10. Naoko Kawasaki
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Correspondence to Yoshihiro Kubozono.

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Mitsuhashi, R., Suzuki, Y., Yamanari, Y. et al. Superconductivity in alkali-metal-doped picene. Nature 464, 76–79 (2010). https://doi.org/10.1038/nature08859

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