Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 512-516 |
| Number of pages | 5 |
| Journal | Journal of the Korean Physical Society |
| Volume | 63 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Aug 2013 |
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Keywords
- Alkali metal
- Cluster
- Ferrimagnetism
- Ferromagnetism
- Kondo lattice
- Polaron
- Zeolite
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Insulator-to-metal transition and magnetism of potassium metals loaded into regular cages of zeolite LSX. / Nakano, Takehito; Thi Hanh, Duong; Owaki, Akihiro; Nozue, Yasuo; Nam, Nguyen Hoang; Araki, Shingo.
In: Journal of the Korean Physical Society, Vol. 63, No. 3, 08.2013, p. 512-516.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Insulator-to-metal transition and magnetism of potassium metals loaded into regular cages of zeolite LSX
AU - Nakano, Takehito
AU - Thi Hanh, Duong
AU - Owaki, Akihiro
AU - Nozue, Yasuo
AU - Nam, Nguyen Hoang
AU - Araki, Shingo
PY - 2013/8
Y1 - 2013/8
N2 - 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.
AB - 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.
KW - Alkali metal
KW - Cluster
KW - Ferrimagnetism
KW - Ferromagnetism
KW - Kondo lattice
KW - Polaron
KW - Zeolite
UR - http://www.scopus.com/inward/record.url?scp=84882987092&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84882987092&partnerID=8YFLogxK
U2 - 10.3938/jkps.63.512
DO - 10.3938/jkps.63.512
M3 - Article
AN - SCOPUS:84882987092
VL - 63
SP - 512
EP - 516
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
SN - 0374-4884
IS - 3
ER -