Journal of the Korean Physical Society

, Volume 63, Issue 3, pp 512–516 | Cite as

Insulator-to-metal transition and magnetism of potassium metals loaded into regular cages of zeolite LSX

  • Takehito Nakano
  • Duong Thi Hanh
  • Akihiro Owaki
  • Yasuo NozueEmail author
  • Nguyen Hoang Nam
  • Shingo Araki


Zeolite LSX (low-silica X) crystals have an aluminosilicate framework with regular supercages and β-cages. They are arrayed in a double diamond structure. The loading density of guest K atoms per supercage (or β cage), n, can be controlled from 0 to ≈ 9. At n < 2, samples are nearly nonmagnetic and insulating. The Curie constant has a clear peak at n = 3, and the electrical resistivity suddenly decreases simultaneously. The electrical resistivity suddenly decreases again at n = 6 and shows metallic phase at n > 6. These properties are explained by the polaron effect including the electron correlation. Ferrimagnetic properties are observed at n ≈ 9. A remarkable increase in the resistivity is observed at very low temperatures at n ≈ 9, and is discussed in terms of the hypothesis of a Kondo insulator.


Alkali metal Cluster Ferromagnetism Ferrimagnetism Polaron Kondo lattice Zeolite 


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  1. [1]
    T. Nakano, N. H. Nam, T. C. Duan, D. T. Hanh, S. Araki and Y. Nozue, to be published in J. Kor. Phys. Soc.Google Scholar
  2. [2]
    Y. Nozue, T. Kodaira and T. Goto, Phys. Rev. Lett. 68, 3789 (1992).ADSCrossRefGoogle Scholar
  3. [3]
    Y. Nozue, T. Kodaira, S. Ohwashi, T. Goto and O. Terasaki, Phys. Rev. B 48, 12253 (1993).ADSCrossRefGoogle Scholar
  4. [4]
    T. Nakano and Y. Nozue, J. Comput. Meth. Sci. Eng. 7, 443 (2007).zbMATHGoogle Scholar
  5. [5]
    D. T. Hanh, T. Nakano and Y. Nozue, J. Phys. Chem. Solids 71, 677 (2010).ADSCrossRefGoogle Scholar
  6. [6]
    V. I. Srdanov, G. D. Stucky, E. Lippmaa and G. Engelhardt, Phys. Rev. Lett. 80, 2449 (1998).ADSCrossRefGoogle Scholar
  7. [7]
    T. Nakano, M. Matsuura, A. Hanazawa, K. Hirota and Y. Nozue, Phys. Rev. Lett. 109, 167208 (2012).ADSCrossRefGoogle Scholar
  8. [8]
    T. Nakano, R. Suehiro, A. Hanazawa, K. Watanabe, I. Watanabe, A. Amato, F. L. Pratt and Y. Nozue, J. Phys. Soc. Jpn. 79, 073707 (2010).ADSCrossRefGoogle Scholar
  9. [9]
    T. Nakano, K. Goto, I. Watanabe, F. L. Pratt, Y. Ikemoto and Y. Nozue, Physica B 374–375, 21 (2006).CrossRefGoogle Scholar
  10. [10]
    D. T. Hanh, T. Nakano and Y. Nozue, J. Phys. Chem. Solids 71, 677 (2010).ADSCrossRefGoogle Scholar
  11. [11]
    T. Nakano, T. Mizukane and Y. Nozue, J. Phys. Chem. Solids 71, 650 (2010).ADSCrossRefGoogle Scholar
  12. [12]
    Y. Nozue, Y. Amako, R. Kawano, T. Mizukane and T. Nakano, J. Phys. Chem. Solids 73, 1538 (2012).ADSCrossRefGoogle Scholar
  13. [13]
    Y. Toyozawa, Prog. Theor. Phys. 26, 29 (1961).MathSciNetADSCrossRefzbMATHGoogle Scholar
  14. [14]
    M. Igarashi, T. Nakano, P. T. Thi, Y. Nozue, A. Goto, K. Hashi, S. Ohki, T. Shimizu, A. Krajnc, P. Jeglic and D. Arcon, Phys. Rev. B 87, 075138 (2013).ADSCrossRefGoogle Scholar
  15. [15]
    Y. Ikemoto, T. Nakano, M. Kuno, Y. Nozue and T. Ikeda, J. Mag. Mag. Mat. 226–230, 229 (2001).CrossRefGoogle Scholar

Copyright information

© The Korean Physical Society 2013

Authors and Affiliations

  • Takehito Nakano
    • 1
  • Duong Thi Hanh
    • 1
  • Akihiro Owaki
    • 1
  • Yasuo Nozue
    • 1
    Email author
  • Nguyen Hoang Nam
    • 2
  • Shingo Araki
    • 3
  1. 1.Department of Physics, Graduate School of ScienceOsaka UniversityOsakaJapan
  2. 2.Center for Materials Science, Faculty of Physics, Hanoi University of ScienceVietnam National UniversityHanoiViet Nam
  3. 3.Graduate School of Natural Science and TechnologyOkayama UniversityOkayamaJapan

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