MISC

2013年8月

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

JOURNAL OF THE KOREAN PHYSICAL SOCIETY
  • Takehito Nakano
  • ,
  • Duong Thi Hanh
  • ,
  • Akihiro Owaki
  • ,
  • Yasuo Nozue
  • ,
  • Nguyen Hoang Nam
  • ,
  • Shingo Araki

63
3
開始ページ
512
終了ページ
516
記述言語
英語
掲載種別
DOI
10.3938/jkps.63.512
出版者・発行元
KOREAN PHYSICAL SOC

Zeolite LSX (low-silica X) crystals have an aluminosilicate framework with regular supercages and beta-cages. They are arrayed in a double diamond structure. The loading density of guest K atoms per supercage (or beta cage), n, can be controlled from 0 to a parts per thousand 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 a parts per thousand 9. A remarkable increase in the resistivity is observed at very low temperatures at n a parts per thousand 9, and is discussed in terms of the hypothesis of a Kondo insulator.

Web of Science ® 被引用回数 : 8

リンク情報
DOI
https://doi.org/10.3938/jkps.63.512
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000323502800059&DestApp=WOS_CPL
ID情報
  • DOI : 10.3938/jkps.63.512
  • ISSN : 0374-4884
  • eISSN : 1976-8524
  • Web of Science ID : WOS:000323502800059

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