Structure and physical properties of Na4C60 under ambient and high pressures

Yoshihiro Kubozono, Y. Takabayashi, Takashi Kambe, S. Fujiki, S. Kashino, S. Emura

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The structure and physical properties of two-dimensional polymeric Na4C60 (body-centered monoclinic, space group 12/m) are studied in a wide temperature region from 12 to 300 K at 1 bar, and in a pressure region up to 53 kbar at 300 K. The temperature dependence of lattice constants suggests a structural anomaly below 100 K where the variation of spin susceptibility is observed from electron spin resonance. The thermal expansion of the unit-cell volume V is smaller than that of monomeric Rb3C60 and K3C60. The compressibility of c is larger than that of a and b, which can be well explained by the repulsion between Na ions. The compressibility of the center-to-center distance in the (101) plane is ∼ 1/3 times smaller than that in the (101) plane, which can be well explained by the formation of the polymer chains. Further, a possibility of a three-dimensional polymerization is discussed on the basis of the pressure dependence of C60···C60 distances.

Original languageEnglish
Article number045418
Pages (from-to)454181-454189
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number4
Publication statusPublished - 2001

Fingerprint

Compressibility
compressibility
Physical properties
physical properties
pressure dependence
Lattice constants
Thermal expansion
Paramagnetic resonance
thermal expansion
electron paramagnetic resonance
Polymers
polymerization
Polymerization
Ions
anomalies
magnetic permeability
Temperature
temperature dependence
polymers
cells

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Structure and physical properties of Na4C60 under ambient and high pressures. / Kubozono, Yoshihiro; Takabayashi, Y.; Kambe, Takashi; Fujiki, S.; Kashino, S.; Emura, S.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 63, No. 4, 045418, 2001, p. 454181-454189.

Research output: Contribution to journalArticle

Kubozono, Y, Takabayashi, Y, Kambe, T, Fujiki, S, Kashino, S & Emura, S 2001, 'Structure and physical properties of Na4C60 under ambient and high pressures', Physical Review B - Condensed Matter and Materials Physics, vol. 63, no. 4, 045418, pp. 454181-454189.
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