Intrinsic Impurity-Band Stoner Ferromagnetism in C60Hn
- Authors
- Lee, Kyu Won; Lee, Cheol Eui
- Issue Date
- 20-4월-2011
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.106, no.16
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 106
- Number
- 16
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112646
- DOI
- 10.1103/PhysRevLett.106.166402
- ISSN
- 0031-9007
- Abstract
- We identify Stoner ferromagnetism in fcc C60Hn (n = odd) by using a local density approximation in the framework of the density functional theory. Hydrogen chemisorption on fullerenes creates quasi-localized pi electrons on the fullerene surface, overlapping of their wave functions giving rise to a narrow half filled impurity band in the fcc C60Hn. The Stoner-type ferromagnetic exchange between the itinerant electrons leads to spin-split impurity bands. The magnetic moment per C60Hn molecule is 1 mu(B) (for n = odd) or 0 (for n = even, including zero), only one of the hydrogens contributing to the spin-split states. Direct overlapping of the quasilocalized pi-electron orbitals is essential for the ferromagnetism.
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Collections - College of Science > Department of Physics > 1. Journal Articles
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