Dimer to monomer phase transition in alkali-metal fullerides: Magnetic susceptibility changes

Kwang S. Kim, Jung Mee Park, Jongseob Kim, Seung Bum Suh, P. Tarakeshwar, Kee Hag Lee, Sung Soo Park

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Ab initio calculations have been employed to investigate the peculiar change in magnetic property (from diamagnetic to paramagnetic) of the dianionic C60-dimer phase in a rapidly cooled AC60 samples (A: alkali metal). We first note that the triplet state of (C60)-22 which was never considered previously is nearly degenerate with the singlet state, and the transition barrier between the two states is reasonably small. This explains the susceptibility increase with an increase in temperature and the magnetic phase transition in the process of the dimer to monomer phase transition.

Original languageEnglish (US)
Pages (from-to)2425-2428
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number11
DOIs
StatePublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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