PMID: 11328171May 1, 2001Paper

Metal-insulator and structural phase transition observed by ESR spectroscopy and x-ray diffraction in KC60

Physical Review Letters
C CoulonJ Hone

Abstract

We have performed electron spin resonance (ESR) spectroscopy and x-ray diffraction experiments at low temperature on KC60 single crystals. ESR data reveal the occurrence of a metal-insulator phase transition at about 50 K. In the same temperature range, we observe the stabilization of a superstructure which doubles the volume of the unit cell. We suggest that displacements of the K atoms and a modulation of the C60 charge may be involved in the mechanism of this phase transition. These results shed new light on the subtle interplay of structure, dimensionality, and electronic properties in the AC60 fullerides.

References

Jan 1, 1995·Physical Review. a·M S ChapmanD E Pritchard
Mar 15, 1995·Physical Review. B, Condensed Matter·S C ErwinE J Mele
Sep 15, 1995·Physical Review. B, Condensed Matter·J HoneA Zettl
Mar 1, 1996·Physical Review. B, Condensed Matter·L GránásyL Forró
Apr 25, 1994·Physical Review Letters·O ChauvetA Jànossy
May 6, 1996·Physical Review Letters·V BrouetL Forro

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Citations

Apr 25, 2009·The Journal of Chemical Physics·Bart VerberckGerhard Gompper
Mar 3, 2005·The Journal of Chemical Physics·A V Nikolaev, K H Michel
Nov 13, 2004·Chemical Reviews·Claude Coulon, Rodolphe Clérac

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