Structure and photoluminescence of helium-intercalated fullerite C₆₀

• Date: 2002
• Main Authors: Legchenkova, I.V., Prokhvatilov, A.I., Stetsenko, Yu.E., Strzhemechny, M.A., Yagotintsev, K.A., Avdeenko, A.A., Eremenko, V.V., Zinoviev, P.V., Zoryansky, V.N., Silaeva, N.B., Ruoff, R.S.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2002
• Series: Физика низких температур
• Subjects: Письма pедактоpу
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/128766
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Structure and photoluminescence of helium-intercalated fullerite C₆₀ / I.V. Legchenkova, A.I. Prokhvatilov, Yu. E. Stetsenko, M.A. Strzhemechny, K.A. Yagotintsev, A.A. Avdeenko, V.V. Eremenko, P.V. Zinoviev, V.N. Zoryansky, N.B. Silaeva, R.S. Ruoff // Физика низких температур. — 2002. — Т. 28, № 12. — С. 1320-1323. — Бібліогр.: 16. назв. — англ.

Intercalation of C₆₀ single crystals with helium was studied by powder x-ray diffractometry. It was established that the intercalation is a two-stage process, octahedral cavities are filled first and then tetrahedral ones, the chemical pressure being negative during both stages. For the first time low-temperature (5 K) photoluminescence spectra of helium-intercalated fullerite C₆₀ were studied. The presence of helium in lattice voids was shown to reduce that part of the luminescent intensity which is due to the emission of covalently bound pairs of C₆₀ molecules, the socalled "deep traps" with the 0-0 transition energy close to 1.69 eV. The mechanism of the effect of the intercalation with helium on the pair formation in fullerite C₆₀ is discussed.